Construction ↔ relates to ↔ Native American Tribal

ited States federal government's official list of sites, buildings, structures, districts, and objects deemed worthy of preservation for their historical significance or "great artistic value". The enactment of the National Historic Preservation Act (NHPA) in 1966 established the National Register and the process for adding properties to it. Of the more than one and a half million properties on the National Register, 100,000 are listed individually. The remainder are contributing resources within historic districts. For most of its history, the National Register has been administered by the National Park Service (NPS), an agency within the United States Department of the Interior. Its goals are to help property owners and interest groups, such as the National Trust for Historic Preservation, and coordinate, identify and protect historic sites in the United States. While National Register listings are mostly symbolic, their recognition of significance provides some financial incentive to owners of listed properties. Protection of the property is not guaranteed. During the nomination process, the property is evaluated in terms of the four criteria for inclusion on the National Register of Historic Places. The application of those criteria has been the subject of criticism by academics of history and preservation, as well as the public and politicians. A property listed in the National Register, or located within a National Register Historic District, may qualify for tax incentives derived from the total value of expenses incurred in preserving the property. Properties can be nominated in various forms, including individual properties, historic districts and multiple property submissions (MPS). The Register categorizes general listings into one of five types of properties: district, site, structure, building or object. National Register Historic Districts are defined geographical areas consisting of contributing and non-contributing properties. Some properties are added automatically to the National Register when they become administered by the National Park Service.

s (NHLD), National Historic Sites (NHS), National Historical Parks, National Military Parks, national memorials, and some national monuments. History On October 15, 1966, the Historic Preservation Act created the National Register of Historic Places and the corresponding State Historic Preservation Offices (SHPO). The National Register initially consisted of the National Historic Landmarks designated before the Register's creation, as well as any other historic sites in the National Park System. Approval of the act, which was amended in 1980 and 1992, represented the first time the United States had a broad-based historic preservation policy. The 1966 act required those agencies to work in conjunction with the SHPO and an independent federal agency, the Advisory Council on Historic Preservation (ACHP), to confront adverse effects of federal activities on historic preservation. To administer the newly created National Register of Historic Places, the National Park Service of the U.S. Department of the Interior, with director George B. Hartzog Jr., established an administrative division named the Federal Office of Archaeology and Historic Preservation (OAHP). Hartzog charged OAHP with creating the National Register program mandated by the 1966 law. Ernest Connally was the Office's first director. Within OAHP new divisions were created to deal with the National Register. The division administered several existing programs, including the Historic Sites Survey and the Historic American Buildings Survey, as well as the new National Register and Historic Preservation Fund. The first official Keeper of the Register was William J. Murtagh, an architectural historian. During the Register's earliest years in the late 1960s and early 1970s, organization was lax and SHPOs were small, understaffed and underfunded. However, funds were still being supplied for the Historic Preservation Fund to provide matching grants-in-aid to listed property owners, first for house museums and institutional buildings, but later for commercial structures as well. In 1979, the NPS history programs affiliated with both the U.S. National Park system and the National Register were categorized formally into two "Assistant Directorates". Established were the Assistant Directorate for Archeology and Historic Preservation and the Assistant Directorate for Park Historic Preservation. From 1978 until 1981, the main agency for the National Register was the Heritage Conservation and Recreation Service (HCRS) of the United States Department of the Interior. In February 1983, the two assistant directorates were merged to promote efficiency and recognize the interdependency of their programs. Jerry L. Rogers was selected to direct this newly merged associate directorate. He was described as a skilled administrator, who was sensitive to the need for the NPS to work with SHPOs, academia and local governments. Although not described in detail in the 1966 act, SHPOs eventually became integral to the process of listing properties on the National Register. The 1980 amendments of the 1966 law further defined the responsibilities of SHPOs concerning the National Register. Several 1992 amendments of the NHPA added a category to the National Register, known as Traditional Cultural Properties: those properties associated with Native American or Hawaiian groups. The National Register of Historic Places has grown considerably from its legislative origins in 1966. In 1986, citizens and groups nominated 3,623 separate properties, sites and districts for inclusion on the National Register, a total of 75,000 separate properties. Of the more than one and a half million properties on the National Register, 100,000 are listed individually.

Criterion A, "Event", the property must make a contribution to the major pattern of American history. Criterion B, "Person", is associated with significant people of the American past. Criterion C, "Design/Construction", concerns the distinctive characteristics of the building by its architecture and construction, including having great artistic value or being the work of a master. Criterion D, "Information potential", is satisfied if the property has yielded or may be likely to yield information important to prehistory or history. The criteria are applied differently for different types of properties; for instance, maritime properties have application guidelines different from those of buildings.

, coined the name "Treasure Valley" in 1959 to reflect the treasure chest of resources and opportunities that the region offered. The valley has a very diverse terrain, from sage flatlands, to mesas, agricultural areas, and urbanized areas. As the Boise Metropolitan Area grows, more and more undeveloped and agricultural land is being urbanized. History Settling the region The tribes that roamed the area, specifically, were the Northern Paiute and Shoshone. In 1834, Thomas McKay built the original Fort Boise, in the area near present-day Parma, which was run for a time by Francois Payette. It later was moved because of flooding troubles and was abandoned in 1854. The Oregon Trail runs through the Treasure Valley. The valley was settled for the most part by ranchers and farmers, initially to supply the gold and silver mining communities in the higher elevations nearby: Idaho City in the Boise Basin and Silver City in the Owyhees. A new Fort Boise was constructed by the U.S. Army in 1863 in present-day Boise, from which the city grew.

ern Oregon to Boise, and is the most populated area in Idaho. Historically, the valley had been known as the Lower Snake River Valley or the Boise River Valley. Pete Olesen, president of the valley's association of local Chambers of Commerce, coined the name "Treasure Valley" in 1959 to reflect the treasure chest of resources and opportunities that the region offered. The valley has a very diverse terrain, from sage flatlands, to mesas, agricultural areas, and urbanized areas.

The Treasure Valley is a valley in the western United States, primarily in southwestern Idaho, where the Payette, Boise, Weiser, Malheur, and Owyhee rivers drain into the Snake River. It includes all the lowland areas from Vale in rural eastern Oregon to Boise, and is the most populated area in Idaho. Historically, the valley had been known as the Lower Snake River Valley or the Boise River Valley. Pete Olesen, president of the valley's association of local Chambers of Commerce, coined the name "Treasure Valley" in 1959 to reflect the treasure chest of resources and opportunities that the region offered. The valley has a very diverse terrain, from sage flatlands, to mesas, agricultural areas, and urbanized areas.

Boise (locally also ) is the capital and most populous city in the U.S. state of Idaho. It is the county seat of Ada County. The population of the city was 235,685 at the 2020 census. The Boise metropolitan area, located in the Treasure Valley, includes five counties of Idaho with an estimated population of 846,000, the most populous metropolitan area in Idaho and 95th-most populous in the United States. Located on the Boise River in southwestern Idaho, it is 41 miles (66 km) east of the Oregon border and 110 miles (177 km) north of the Nevada border. Downtown Boise's elevation is 2,704 feet (824 m) above sea level. Boise is home to major employers in the technology, manufacturing, and service sectors, including companies such as Micron Technology and Hewlett-Packard.

an area in Idaho and 95th-most populous in the United States. Located on the Boise River in southwestern Idaho, it is 41 miles (66 km) east of the Oregon border and 110 miles (177 km) north of the Nevada border. Downtown Boise's elevation is 2,704 feet (824 m) above sea level. Boise is home to major employers in the technology, manufacturing, and service sectors, including companies such as Micron Technology and Hewlett-Packard.

...that the military should continue killing Indians 'until the last Indian in the Territories was either on his reservation or enriched the sagebrush with his decaying carcass.' ...if the Indians refused to move there, 'they will be killed or put on the reservation by force, and certainly shot if they don't stay there.' Furthermore, the editor continues, 'The idea that the Indians have any right to the soil is ridiculous. ...They have no more rights to the soil of the Territories of the United States than wolves or coyotes...' This would be our plan of establishing friendship upon an eternal basis with our Indians: Let all the hostile bands of Idaho Territory be called in (they will not be caught in any other manner) to attend a grand treaty; plenty of blankets and nice little trinkets distributed among them; plenty of grub on hand; have a real jolly time with them; then just before the big feast put strychnine in their meat and poison to death the last mother's son of them. At the same time, native warriors around the valley, under the leadership of Howluck also known as "Bigfoot" among white settlers, among others, waged an escalating and intensified guerrilla campaign of harassment of passerby caravans along the Oregon Trail. The United States Army also escalated and intensified "punitive expeditions" against formations of warriors and against civilian communities as well. This marked the start of the "unofficial" Snake War in 1866. This war lasted until 1868, and is statistically the deadliest of the Indian Wars in the West in terms of casualties. In the end, 1,762 men were counted as the casualties of this war from both sides. In 1868, Fort Hall Indian Reservation was established in Southeastern Idaho, about 220 miles upstream, according to the terms of Fort Bridger Treaty. The Boise Valley Shoshone and Bannock Tribes were not party to this treaty. Nevertheless, in April 1869, the United States Military embarked on a campaign of "Removal, rounding up of natives in the region including in and around Boise, and expelling them with cavalry escort to Fort Hall Indian Reservation. This period is known among the Shoshone and Bannock people as Idaho's Trail of Tears. Some of the natives managed to escape, and they ran to either Duck Valley or Fort McDermitt in Nevada. Incorporation and growth Boise's early growth was significantly driven by its role in supplying the nearby gold towns that sprung up in the 1860s northeast and then southwest of the town. Miners sometimes wintered in Boise and a number of early prominent businessmen were miners who settled in town in the years after the gold rush waned. By 1864 substantial agricultural production was underway on easily irrigated lands near the river and three canal companies had been incorporated. Early transportation improvements were largely a result of toll road franchises awarded by the territorial legislature starting in the 1860s. These first ran from Fort Boise to the mining centers in the Boise Basin and east to Rocky Bar and to Rattlesnake Station where they connected to the Oregon Trail. Territorial census records from a special 1864 enumeration list the population of Boise as 1,658, and an act of December 12, 1864, was the first attempt by the Idaho Territorial Legislature to incorporate the city. This was rejected by voters the following March. Two more unsuccessful attempts were made to organize a city administration by election before the 1866 version of the city charter was approved by voters on January 6, 1868. The growing number of homes and businesses, for which owners wanted proper legal title, may have contributed to the eventual success of incorporation. All of these rejected efforts to incorporate the city came after Boise had been controversially made the state capital in 1864 over strong opposition from northern Idaho interests. This decision reflected the rapid shift of population growth from north to south after the discovery of gold in southern Idaho. By 1868 Boise had over 400 permanent buildings with a wide range of commercial services. 1868 also marked the formal beginning of a long advocacy for railroad connections to other Idaho communities and, just as importantly, to other growing cities in the west such as Portland, Oregon. Competing railroad and western state government interests frustrated these efforts for many years. Designed by Alfred B. Mullett, the U.S. Assay Office at 210 Main Street was built in 1871 and today is a National Historic Landmark. It first began accepting gold and silver for purchase on March 2, 1872, largely eliminating the need to transport ore to the mint in San Francisco. A territorial penitentiary, now known as the Old Idaho State Penitentiary, opened the same month several miles east of town. Mining continued to be important to Boise's economic growth and periodic booms contributed to population growth as well, though production of gold and silver probably peaked in the 1860s. 1882's gold and silver production of $3,500,000 declined to $1,488,315 (including lead) by 1899. Boise began to earn its City of Trees nickname in this period with a popular focus on a range of tree planting projects. Thomas J. Davis planted several thousand fruit trees in 1864 and several other early businessmen either founded nurseries or orchards of their own. In the 1870s tree planting began in earnest in downtown Boise led by prominent hotels as well as businessmen and residents. In 1907 Davis donated 43 acres of his orchard property to the city for use as a park in the name of his wife Julia. Commercial agriculture continued to expand, but was slowed by the lack of reliable rail links to regional and national markets and by a lack of large scale irrigation projects, which themselves were often tied to hoped-for railroad projects for financing. A.D. Foote, a successful mining engineer, drew up plans to irrigate up to 500,000 acres immediately south of Boise in 1882, but progress was halting and smaller farms were the norm until after the turn of the century with most located near to the river bottom where soil was productive and irrigation more easily achieved. Fruit orchards proliferated and sugar beets, still an important agricultural industry in Idaho, began to be widely cultivated in the 1890s. Cattle and sheep farming became increasingly important as the century closed. With the exception of dairy, most livestock products were exported from Idaho, unlike other agricultural products which were still largely scaled to support local markets. The timber industry also increasingly thrived in the Boise market in the 1880s and 1890s. Large quantities of timber were exported from elsewhere in Idaho, but a growing Boise supported the expansion of Alexander Rossi's sawmill, first established in 1865. Prominent early Boisean William Ridenbaugh had inherited control of the canal now bearing his name from his uncle William Morris in 1878 and later partnered with Rossi to expand the sawmill capacity under the name Rossi and Ridenbaugh Lumber Company. Their materials supported bridge building and the rapid expansion of Boise in the 1890s. As with many early infrastructure ventures, electrification succeeded only after at least one false start. July 4, 1887, marked the start of electrical transmission from a plant located on the Bench. William Ridenbaugh provided expertise and manpower for the water supply and several months were spent rigging poles and lines from the Bench to the service area across the river. Additional electrical supplies allowed the building of an electric streetcar line in 1891. This ran without interruption until buses replaced the lines in 1927, tracking—and sometimes driving—the development of Boise and nearby communities. This system expanded over several decades, reaching into the North End, South Boise and across the river on Front St. A loop line, completed in 1912, ran as far as Caldwell and Nampa, providing transport throughout the valley. Three early trolley companies merged in 1912 to form the Idaho Traction Company with a depot at 7th and Bannock Streets downtown. Additional services and urban amenities arrived in the 1890s as Boise grew. Exploratory drilling for hot water was successful in 1890 and by the end of the decade many homes along Warm Springs avenue were being heated by this source. A natatorium was built in 1892 close to the source of the hot water near the Idaho State Penitentiary. Churches serving several denominations, a Jewish synagogue, a major hardware store and department store, a Masonic hall, the Columbia Theater, Saint Alphonsus' Hospital, a number of parochial and secular schools, a City Hall and a new Union Pacific passenger station, constructed when service was finally extended to downtown, were all built during the 1890s. Falk's Department Store sponsored a semi-professional baseball team representing Boise from at least 1892 and the city supported other organized sports as they became popular.

The Idaho Transportation Department (ITD) is the state of Idaho governmental organization responsible for state transportation infrastructure. This includes ongoing operations and maintenance as well as planning for future needs of the state and its citizens.

plan, build and maintain new state highways alter, improve or discontinue any state highway purchase, condemn, or otherwise obtain necessary easements have general supervision of all highways within the state expend the fund created for the construction, maintenance and improvement of state highways maintain and improve state highways make and enforce rules employ a Chief Engineer and assistants supervise registration of vehicles keep a complete record of all activities and expenses In 1919, the Commission was abolished and its functions were transferred to a Bureau of Highways in the Department of Public Works. A property tax was enacted by the Legislature to fund roads for the state and bonds were issued to build a highway system. In 1950, the Idaho Department of Highways was reorganized and placed under the direction of a governing Board. In 1974, the Idaho Department of Highways became the Idaho Transportation Department.

ITD is organized into five divisions and six district offices. The agency serves under an appointed seven member Idaho Transportation Board. The board establishes state transportation policy and guides the planning, development and management of the Idaho transportation network. The board is appointed by the governor. One board member represents each of the six regional districts. A seventh member is appointed as chairman of the board. The department has the following six divisions: Administration Aeronautics Highways Human Resources Motor Vehicles District offices District 1: Benewah, Bonner, Boundary, Kootenai, and Shoshone counties. Headquartered in Coeur d'Alene. District 2: Clearwater, Idaho, Latah, Lewis, and Nez Perce counties. Headquartered in Lewiston. District 3: Ada, Adams, Boise, Canyon, Elmore, Gem, Owyhee, Payette, Valley, and Washington counties. Headquartered in Boise. District 4: Blaine, Camas, Cassia, Gooding, Jerome, Lincoln, Minidoka, and Twin Falls counties. Headquartered in Shoshone. District 5: Bannock, Bear Lake, Bingham, Caribou, Franklin, Oneida, and Power counties. Headquartered in Pocatello. District 6: Bonneville, Butte, Clark, Custer, Fremont, Jefferson, Lemhi, Madison, and Teton counties.

ve, conserve and protect buildings, objects, landscapes or other artifacts of historical significance. It is a philosophical concept that became popular in the twentieth century, which maintains that cities as products of centuries' development should be obligated to protect their patrimonial legacy.

Areas of paid professional practice As of 2018 in the United States, about 70% of professional, paid practice in historic preservation is in the area of regulatory compliance, which is driven by laws, regulations, and guidelines promulgated at the federal, state, and local levels. At the federal level, these include the National Historic Preservation Act of 1966 and associated regulations, such as Section 106, National Register of Historic Places, and the Secretary of the Interior's Standards; many states have laws that reference these federal regulations or create parallel regulations, using federal regulatory language. At the local level, preservation laws and regulations are known as "preservation ordinances" and define the need for private property owners to seek a "certificate of appropriateness" when making modifications to existing buildings that are listed in a local historical register. Australia All of Australia's major cities have had historic or heritage preservation establishments and legislation in place since the mid to late 1970s, though destruction or outright demolition of historic buildings continues in most Australian cities to this day, subject to council or planning approval, particularly outside of the city centres in historic neighbourhoods. Melbourne was founded in 1835 and grew enormously in wealth and prosperity following the 1850s gold rush, which resulted in a construction boom: large edifices were erected to serve as public buildings such as libraries, court houses, schools, churches, and offices. This led to a period where Melbourne became known as "Marvellous Melbourne", boasting the largest collection of Victorian architecture outside of England. However, in the years that followed, and as the thousands of Australian soldiers arrived back from the battlefields following the end of World War I there emerged a sense of renewed pride and a willingness to forget the dark days of war and distance Australian from its Victorian origins, considered "unfashionable" or "outdated" by some. The Council of the City of Melbourne was no doubt buoyed by this new nationalistic pride and put in place schemes to modernize the city which included increasing the building height limit and removing some of the Victorian era cast ironwork. In the years leading up to World War II the Whelan the Wrecker firm had already pulled down thousands of structures in both the city and surrounding suburbs, as Melbourne became particularly conscious of International Modernism. James Paul Whelan's obituary of 1938 suggests that his company had the task of demolishing up to 98% of buildings marked for removal in the city alone. The rise of this International Modernism saw a new approach that valued replacing older, elaborate inefficient buildings with new ones. An early example of this was a City of Melbourne by-law in 1954 that mandated the demolition of all posted cast-iron verandas, thought to be dangerous as well as old fashioned, in order to 'clean up' the city before the 1956 Summer Olympics. Sydney (Australia's oldest city) was also affected by the International Modernism period and also suffered an extensive loss of its Victorian architecture, something that subsisted well into the 1980s. From the 1950s onwards, many of Sydney's handsome sandstone and masonry buildings were wiped away by architects and developers who built "brown concrete monstrosities" in their place. The 1980s saw "uncomfortable pastiches of facades with no coherence and little artistic merit". Green bans in Australian cities such as Sydney and Melbourne came into effect in the 1970s and the Australian Heritage Commission (AHS), was established by the Federal Government in 1975 by the Australian Heritage Commission Act 1975 as the first body to manage natural and cultural heritage in Australia until its demise in 2004. It was responsible for the Register of the National Estate. The Australian National Heritage List was established in 2003. Controversy arose in 2016 in Melbourne after the historic Corkman Irish Pub was illegally demolished overnight, resulting in the State Planning Minister pursuing an order (via the Victorian Administrative Appeals Tribunal) for the two-story pub to be rebuilt. The site owners were fined AUD$1.325 million after pleading guilty to the process. In the city of Adelaide, large public protests erupted in the 1980s regarding the 1983 campaign to save the Aurora Hotel in Hindmarsh Square, which had been recommended for listing on the city heritage register but refused because the site was to be redeveloped. The protest led to the emergence of Aurora Heritage Action, Inc. (AHA), which became the most vocal heritage lobby group in Adelaide during the decade, often working in cooperation with residents' associations and later the National Trust. While governments were urged to protect the traditional character of Adelaide, capital became more widely available for development. The large increase in property development from 1987 increased opposition to further demolition of Adelaide's historic buildings. Local councils and lobbyists alike aimed to expand the horizon of heritage to protect historic precincts across the city, even if buildings within those precincts did not warrant heritage listing. The Bannon government slowly responded to public demand and introduced historic (conservation) zones through a revision to the Planning Act (1982) in 1989.

All of Australia's major cities have had historic or heritage preservation establishments and legislation in place since the mid to late 1970s, though destruction or outright demolition of historic buildings continues in most Australian cities to this day, subject to council or planning approval, particularly outside of the city centres in historic neighbourhoods. Melbourne was founded in 1835 and grew enormously in wealth and prosperity following the 1850s gold rush, which resulted in a construction boom: large edifices were erected to serve as public buildings such as libraries, court houses, schools, churches, and offices. This led to a period where Melbourne became known as "Marvellous Melbourne", boasting the largest collection of Victorian architecture outside of England. However, in the years that followed, and as the thousands of Australian soldiers arrived back from the battlefields following the end of World War I there emerged a sense of renewed pride and a willingness to forget the dark days of war and distance Australian from its Victorian origins, considered "unfashionable" or "outdated" by some. The Council of the City of Melbourne was no doubt buoyed by this new nationalistic pride and put in place schemes to modernize the city which included increasing the building height limit and removing some of the Victorian era cast ironwork. In the years leading up to World War II the Whelan the Wrecker firm had already pulled down thousands of structures in both the city and surrounding suburbs, as Melbourne became particularly conscious of International Modernism. James Paul Whelan's obituary of 1938 suggests that his company had the task of demolishing up to 98% of buildings marked for removal in the city alone. The rise of this International Modernism saw a new approach that valued replacing older, elaborate inefficient buildings with new ones. An early example of this was a City of Melbourne by-law in 1954 that mandated the demolition of all posted cast-iron verandas, thought to be dangerous as well as old fashioned, in order to 'clean up' the city before the 1956 Summer Olympics. Sydney (Australia's oldest city) was also affected by the International Modernism period and also suffered an extensive loss of its Victorian architecture, something that subsisted well into the 1980s. From the 1950s onwards, many of Sydney's handsome sandstone and masonry buildings were wiped away by architects and developers who built "brown concrete monstrosities" in their place. The 1980s saw "uncomfortable pastiches of facades with no coherence and little artistic merit". Green bans in Australian cities such as Sydney and Melbourne came into effect in the 1970s and the Australian Heritage Commission (AHS), was established by the Federal Government in 1975 by the Australian Heritage Commission Act 1975 as the first body to manage natural and cultural heritage in Australia until its demise in 2004. It was responsible for the Register of the National Estate. The Australian National Heritage List was established in 2003. Controversy arose in 2016 in Melbourne after the historic Corkman Irish Pub was illegally demolished overnight, resulting in the State Planning Minister pursuing an order (via the Victorian Administrative Appeals Tribunal) for the two-story pub to be rebuilt. The site owners were fined AUD$1.325 million after pleading guilty to the process. In the city of Adelaide, large public protests erupted in the 1980s regarding the 1983 campaign to save the Aurora Hotel in Hindmarsh Square, which had been recommended for listing on the city heritage register but refused because the site was to be redeveloped. The protest led to the emergence of Aurora Heritage Action, Inc. (AHA), which became the most vocal heritage lobby group in Adelaide during the decade, often working in cooperation with residents' associations and later the National Trust. While governments were urged to protect the traditional character of Adelaide, capital became more widely available for development. The large increase in property development from 1987 increased opposition to further demolition of Adelaide's historic buildings. Local councils and lobbyists alike aimed to expand the horizon of heritage to protect historic precincts across the city, even if buildings within those precincts did not warrant heritage listing. The Bannon government slowly responded to public demand and introduced historic (conservation) zones through a revision to the Planning Act (1982) in 1989.

105, which by 2025 was estimated to have risen to 275,123, making it the second-most populous county in Idaho. The county seat is Caldwell, and its largest city is Nampa. Canyon County is part of the Boise metropolitan area. History Hudson's Bay Company established Fort Boise in 1834 near what is now Parma, but abandoned it in 1855. Emigrants traveled through Canyon County on the Oregon Trail. Discovery of gold in the Boise Basin in 1862 brought settlement to the region again. The lower Boise River was fully contained within Boise County from 1863 until the formation of Ada County in 1864. Settlement of the lower Boise River west of Boise City was limited prior to the completion of the Oregon Short Line Railroad. Middleton was the first European settlement of Canyon County, starting in 1863. The 1870 Census for Ada County listed 76 residents of the Boise Valley, excluding Boise City and the 1880 Census listed 44 residents at Middleton. The arrival of the railroad at Caldwell led to the establishment of a town there as of August 1883. Businessmen James A. McGee and Alexander Duffes filed the plat for nearby Nampa in 1886. Parma was settled around the same time, with the Old Fort Boise post office being moved to the town's location; it was incorporated in 1904. Ada County established precincts for each of the settlements with a combined 1890 Census population of 2,311. Significant settlement of Greenleaf and Notus started around 1904 with the two settlements listed as precincts at the 1910 census. Notus was incorporated in 1921 while Greenleaf was incorporated prior to 1980. Melba was incorporated in 1912 while Wilder was incorporated in 1919. The City of Star annexed a portion of territory in northeast Canyon County prior to 2007, becoming the county's ninth incorporated city. The majority of Star is located within Ada County. The Idaho Legislature created Canyon County from Ada County in an act approved March 7, 1891, effective at the November 26, 1892, election. Caldwell was established as the county seat. The county originally contained all of Canyon and Payette counties and part of Gem; Gem County formed in 1915 and Payette County in 1917.

History Hudson's Bay Company established Fort Boise in 1834 near what is now Parma, but abandoned it in 1855. Emigrants traveled through Canyon County on the Oregon Trail. Discovery of gold in the Boise Basin in 1862 brought settlement to the region again. The lower Boise River was fully contained within Boise County from 1863 until the formation of Ada County in 1864. Settlement of the lower Boise River west of Boise City was limited prior to the completion of the Oregon Short Line Railroad. Middleton was the first European settlement of Canyon County, starting in 1863. The 1870 Census for Ada County listed 76 residents of the Boise Valley, excluding Boise City and the 1880 Census listed 44 residents at Middleton. The arrival of the railroad at Caldwell led to the establishment of a town there as of August 1883. Businessmen James A. McGee and Alexander Duffes filed the plat for nearby Nampa in 1886. Parma was settled around the same time, with the Old Fort Boise post office being moved to the town's location; it was incorporated in 1904. Ada County established precincts for each of the settlements with a combined 1890 Census population of 2,311. Significant settlement of Greenleaf and Notus started around 1904 with the two settlements listed as precincts at the 1910 census. Notus was incorporated in 1921 while Greenleaf was incorporated prior to 1980. Melba was incorporated in 1912 while Wilder was incorporated in 1919. The City of Star annexed a portion of territory in northeast Canyon County prior to 2007, becoming the county's ninth incorporated city. The majority of Star is located within Ada County. The Idaho Legislature created Canyon County from Ada County in an act approved March 7, 1891, effective at the November 26, 1892, election. Caldwell was established as the county seat. The county originally contained all of Canyon and Payette counties and part of Gem; Gem County formed in 1915 and Payette County in 1917.

2000 census As of the 2000 census, there were 131,441 people, 45,018 households and 33,943 families living in the county. The population density was 223 people per square mile (86 people/km2). There were 47,965 housing units at an average density of 81 units per square mile (31 units/km2). The racial makeup of the county was 83.10% White, 0.32% Black or African American, 0.85% Native American, 0.80% Asian, 0.13% Pacific Islander, 12.17% from other races, and 2.62% from two or more races. Hispanic or Latino of any race were 18.61% of the population. 15.9% were of German, 12.7% English, 10.3% American and 7.6% Irish ancestry. There were 45,018 households, of which 39.80% had children under the age of 18 living with them, 60.70% were married couples living together, 10.10% had a female householder with no husband present, and 24.60% were non-families. 19.80% of all households were made up of individuals, and 8.40% had someone living alone who was 65 years of age or older. The average household size was 2.85 and the average family size was 3.28. 30.90% of the population were under the age of 18, 10.70% from 18 to 24, 28.30% from 25 to 44, 19.10% from 45 to 64, and 11.00% who were 65 years of age or older. The median age was 30 years. For every 100 females, there were 98.70 males. For every 100 females age 18 and over, there were 96.30 males. The median household income was $35,884 and the median family income was $40,377. Males had a median income of $29,418 compared with $22,044 for females. The per capita income for the county was $15,155. About 8.70% of families and 12.00% of the population were below the poverty line, including 14.50% of those under age 18 and 10.70% of those age 65 or over. Communities Cities Unincorporated communities Bowmont Huston Roswell Sunnyslope Walters Ferry, Idaho Politics Like the majority of Idaho, Canyon County is reliably Republican by comfortable margins. The last time a Democratic candidate carried the county was in 1936 by Franklin D. Roosevelt.