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Colorado Census Statistical Areas
The U.S. State of Colorado has 20 statistical areas that have been delineated by the Office of Management and Budget (OMB). Statistical areas are important geographic delineations of population clusters used by the OMB, the United States Census Bureau, planning organizations, and federal, state, and local government entities. On July 21, 2023, the OMB delineated three combined statistical areas, seven metropolitan statistical areas, and ten micropolitan statistical areas in Colorado. The most populous of these statistical areas is the 12-county Denver–Aurora–Greeley, CO Combined Statistical Area with a United States Census Bureau estimated population of 3,752,505 as of July 1, 2024. The Denver–Aurora–Greeley, CO Combined Statistical Area, the Colorado Springs, CO Metropolitan Statistical Area, the Fort Collins–Loveland, CO Metropolitan Statistical Area, the Pueblo-Cañon City, CO Combined Statistical Area, and the Cheyenne, WY Metropolitan Statistical Area com ...
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United States
The United States of America (USA), also known as the United States (U.S.) or America, is a country primarily located in North America. It is a federal republic of 50 U.S. state, states and a federal capital district, Washington, D.C. The 48 contiguous states border Canada to the north and Mexico to the south, with the semi-exclave of Alaska in the northwest and the archipelago of Hawaii in the Pacific Ocean. The United States asserts sovereignty over five Territories of the United States, major island territories and United States Minor Outlying Islands, various uninhabited islands in Oceania and the Caribbean. It is a megadiverse country, with the world's List of countries and dependencies by area, third-largest land area and List of countries and dependencies by population, third-largest population, exceeding 340 million. Its three Metropolitan statistical areas by population, largest metropolitan areas are New York metropolitan area, New York, Greater Los Angeles, Los Angel ...
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Weld County, Colorado
Weld County is a county located in the U.S. state of Colorado. As of the 2020 census, the population was 328,981. The county seat is Greeley. Weld County comprises the Greeley, CO Metropolitan Statistical Area, which is included in the Denver–Aurora, CO Combined Statistical Area. History On May 30, 1854, the Kansas–Nebraska Act created the Nebraska Territory and the Kansas Territory, divided by the Parallel 40° North ( Baseline Road or County Line Road or Weld County Road 2 in the future Weld County). Present-day Weld County, Colorado, lay in the southwestern portion of the Nebraska Territory, bordering the Kansas Territory. In July 1858, gold was discovered along the South Platte River in Arapahoe County, Kansas Territory. This discovery precipitated the Pike's Peak Gold Rush. Many residents of the mining region felt disconnected from the remote territorial governments of Kansas and Nebraska, so they voted to form their own Territory of Jefferson on Octobe ...
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Gilpin County, Colorado
Gilpin County is a county located in the U.S. state of Colorado, smallest in land area behind only the City and County of Broomfield. As of the 2020 census, the population was 5,808. The county seat is Central City. The county was formed in 1861, while Colorado was still a territory, and was named after Colonel William Gilpin, the first territorial governor. Gilpin County is part of the Denver-Aurora-Lakewood, CO Metropolitan Statistical Area. Geography According to the U.S. Census Bureau, the county has a total area of , of which is land and (0.2%) is water. It is the second-smallest county by area in Colorado. Adjacent counties * Boulder – north * Jefferson – east * Clear Creek – south * Grand – west Major highways * State Highway 46 * State Highway 72 * State Highway 119 * Central City Parkway National protected areas * Arapaho National Forest * James Peak Wilderness * Roosevelt National Forest State protected area * Golden Gate Canyon State P ...
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Clear Creek County, Colorado
Clear Creek County is a county located in the U.S. state of Colorado. As of the 2020 census, the population was 9,397. The county seat is Georgetown. History Clear Creek County was one of the original 17 counties created by the Colorado legislature on November 1, 1861, and is one of only two counties (along with Gilpin) to have persisted with its original boundaries unchanged. It was named after Clear Creek, which runs down from the continental divide through the county. Idaho Springs was originally designated the county seat, but the county government was moved to Georgetown in 1867. Geography According to the U.S. Census Bureau, the county has a total area of , of which is land and (0.3%) is water. Adjacent counties * Jefferson - east * Gilpin - northeast * Park - south * Summit - west * Grand - northwest Major highways * Interstate 70 * U.S. Highway 6 * U.S. Highway 40 * State Highway 5 * State Highway 103 * Central City Parkway National protected a ...
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Park County, Colorado
Park County is a county located in the U.S. state of Colorado. As of the 2020 United States census, 2020 census, the population was 17,390. The county seat and largest incorporated town is Fairplay, Colorado, Fairplay, while the unincorporated community of Bailey, Colorado, Bailey is the largest settlement overall. The county was named after the large geographic region known as South Park (Park County, Colorado), South Park, which was named by early fur traders and trappers in the area. Park County is included in the Denver–Aurora, Colorado, Aurora–Lakewood, Colorado, Lakewood, CO Denver–Aurora–Lakewood, CO Metropolitan Statistical Area, Metropolitan Statistical Area. A majority of the county lies within the boundaries of the South Park National Heritage Area. Geography At the 2020 United States census, the county had a total area of , of which is land and (0.8%) is water. The geographic center of the State of Colorado is located in Park County at coordinates . The he ...
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Elbert County, Colorado
Elbert County is a county located in the U.S. state of Colorado. As of the 2020 census, the population was 26,062. The county seat is Kiowa and the largest town is Elizabeth. Elbert County is included in the Denver-Aurora- Lakewood, CO Metropolitan Statistical Area. History Elbert County was created on February 2, 1874, from the eastern portions of Douglas County. On February 6, 1874, the county was enlarged to include part of northern Greenwood County upon Greenwood's dissolution, and originally extended south and east of its present boundaries to reach to the Kansas state line. The county was named for Samuel Hitt Elbert, the Governor of the Territory of Colorado when the county was formed. In 1889, Elbert County was reduced to its modern size when its eastern portions were taken to create Lincoln, Kit Carson, and Cheyenne counties. Geography According to the U.S. Census Bureau, the county has a total area of , of which is land and (0.01%) is water. Adjacent count ...
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Broomfield, Colorado
Broomfield is a List of municipalities in Colorado#Consolidated city and county, consolidated city and county located in the United States, U.S. Colorado, state of Colorado. It has a consolidated government which operates under Article XX, Sections 10–13 of the Constitution of Colorado, Constitution of the State of Colorado. Broomfield's population was 74,112 at the 2020 United States census, making it the List of municipalities in Colorado, 15th most populous municipality and the List of counties in Colorado, 12th most populous county in Colorado. Broomfield is a part of the Denver metropolitan area, Denver–Aurora–Lakewood, CO Metropolitan Statistical Area and the Front Range urban corridor. History The Broomfield post office opened on September 26, 1884. Historians speculate that the town was named for the sorghum grown in the area, also known as broomcorn, which had stalks that were sold to make brooms and whisk brooms. Several railroads figure in the development of th ...
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Douglas County, Colorado
Douglas County is a county located in the U.S. state of Colorado. As of the 2020 Census, the population was 357,978. The county is named in honor of U.S. Senator Stephen A. Douglas. The county seat is Castle Rock. Douglas County is part of the Denver metropolitan area. It is located midway between Colorado's two largest cities, Denver and Colorado Springs, and contains a portion of Aurora, the state's third-largest city. Douglas County has the highest median household income of any Colorado county or statistical equivalent. It is ranked seventh nationally in that category. Overview Douglas County is lightly wooded, mostly with ponderosa pine, with broken terrain characterized by mesas, foothills, and small streams. Cherry Creek and Plum Creek rise in Douglas County and flow north toward Denver and into the South Platte River. Both were subject to flash flooding in the past, Plum Creek being partially responsible for the Denver flood of 1965. Cherry Creek and Plum ...
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Adams County, Colorado
Adams County is a county located in the U.S. state of Colorado. As of the 2020 United States census, the population was 519,572. The county seat is Brighton, and the largest city is Thornton. The county is named for Alva Adams, an early Governor of the State of Colorado in 1887–1889. Adams County is part of the Denver metropolitan area. History On May 30, 1854, the Kansas–Nebraska Act created the Territory of Nebraska and Territory of Kansas, divided by the Parallel 40° North ( 168th Avenue in present-day Adams County). The future Adams County, Colorado, occupied a strip of northern Arapahoe County, Kansas Territory, immediately south of the Nebraska Territory. In 1859, John D. "Colonel Jack" Henderson built a ranch, trading post, and hotel on Henderson Island in the South Platte River in Arapahoe County, Kansas Territory. Jack Henderson was the former editor and proprietor of the Leavenworth (Kansas Territory) Journal and an outspoken pro-slavery politician ...
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Jefferson County, Colorado
Jefferson County is a county located in the U.S. state of Colorado. As of the 2020 census, the population was 582,910, making it the fourth-most populous county in Colorado. The county seat is Golden, and the most populous city is Lakewood. Jefferson County is included in the Denver-Aurora-Lakewood, CO Metropolitan Statistical Area. Located along the Front Range of the Rocky Mountains, Jefferson County is adjacent to the state capital of Denver. In 2010, the center of population of Colorado was located in Jefferson County. The county's slogan is the "Gateway to the Rocky Mountains", and it is commonly nicknamed Jeffco. The name Jeffco is incorporated in the name of the Jeffco School District, the Jeffco Business Center Metropolitan District No. 1, and several businesses located in Jefferson County. Jeffco is also incorporated in the unofficial monikers of many Jefferson County agencies. The Rocky Mountain Metropolitan Airport operated by Jefferson County was previously k ...
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Arapahoe County, Colorado
Arapahoe County ( ) is a county located in the U.S. state of Colorado. As of the 2020 United States census, 2020 census, its population was 655,070, making it the third-most populous county in Colorado. The county seat is Littleton, Colorado, Littleton, and the most populous city is Aurora, Colorado, Aurora. The county was named for the Arapaho Native Americans in the United States, Native American tribe, who once lived in the region. Arapahoe County is part of the Denver-Aurora-Lakewood, Colorado, Lakewood Denver-Aurora-Lakewood, CO Metropolitan Statistical Area, metropolitan statistical area. Arapahoe County calls itself "Colorado's First County", since its origins antedate the Pike's Peak Gold Rush. History On August 25, 1855, the Kansas Legislature, Kansas Territorial Legislature created a huge Arapahoe County, Kansas Territory, Arapahoe County to govern the entire western portion of the Territory of Kansas. The county was named for the Arapaho Nation, who lived in the regio ...
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