List of counties in Colorado
From Wikipedia, the free encyclopedia
On November 1, 1861, the Territory of Colorado created 17 counties. A number of them have been split over the years. The following is a list of the 64 counties in the U.S. state of Colorado. The links in the column FIPS County Code are to the Census Bureau Info page for that county.
The FIPS county code is the five-digit Federal Information Processing Standard (FIPS) code which uniquely identifies counties and county equivalents in the United States. The three-digit number is unique to each individual county within a state, but to be unique within the entire United States, it must be prefixed by the state code. This means that, for example, while Adams County, Colorado is number 001, there is also an Adams County, North Dakota that is also 001, and a Baker County, Oregon that is also 001; there also is an Adams County, Idaho that is number 003. While El Paso County, Colorado is number 039, Brazoria County, Texas and Dallas County, Arkansas also have the number 039. There also is an El Paso County, Texas with the number 141. To uniquely identify El Paso County, Colorado, you would need to use the state code of 08 plus the county code of 039. Thus the unique identifier for the entire United States for Adams County, Colorado would be 08001, and El Paso County, Colorado would be 08039 etc.
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| County name | FIPS county code | County seat | Formed | History |
| Adams County | 001 | 1902 | from part of Arapahoe county. | |
| Alamosa County | 003 | 1913 | from parts of Conejos and Costilla counties. | |
| Arapahoe County | 005 | 1861 | one of the original 17 counties, the first to be incorporated. | |
| Archuleta County | 007 | 1885 | from part of Conejos county. | |
| Baca County | 009 | 1889 | from part of Las Animas county. | |
| Bent County | 011 | 1874 | from part of Greenwood county. | |
| Boulder County | 013 | 1861 | one of the original 17 counties. | |
| City and County of Broomfield | 014 | 2001 | from parts of Adams, Boulder, Jefferson and Weld counties. | |
| Chaffee County | 015 | 1879 | from part of Lake county. | |
| Cheyenne County | 017 | 1889 | from parts of Bent and Elbert counties. | |
| Clear Creek County | 019 | 1861 | one of the original 17 counties. | |
| Conejos County | 021 | 1861 | one of the original 17 counties. Originally also known as Guadalupe county | |
| Costilla County | 023 | 1861 | one of the original 17 counties. | |
| Crowley County | 025 | 1911 | from part of Otero county. | |
| Custer County | 027 | 1877 | from part of Fremont county. | |
| Delta County | 029 | 1883 | from part of Gunnison county. | |
| City and County of Denver | 031 | 1902 | from part of Arapahoe county. | |
| Dolores County | 033 | 1881 | from part of San Juan county. | |
| Douglas County | 035 | 1861 | one of the original 17 counties. | |
| Eagle County | 037 | 1883 | from part of Summit county.
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[edit] References
[edit] New Counties Planned
- The City of Aurora, which is currently located in two counties; Arapahoe, and Adams, is scheduled to become a consolidated city-county (joining Denver and Broomfield as the only city-counties in the state) around 2008.
[edit] Defunct counties
- Greenwood County - formed in 1870 from part of Huerfano county and the Arapahoe and Cheyenne Reserve. In 1874 was abolished and Bent and Elbert counties created.
- Platte County - formed in 1872 from part of Weld county. In 1874 was abolished and its territory returned to Weld county.
