LIST OF COUNTIES IN COLORADO

Colorado counties

Main articles: Geography of Colorado

This is a 'list of the 64 counties of the U.S. State of Colorado'. The counties of Colorado are important components of government since the state has no secondary civil subdivisions such as townships. Two counties, the City and County of Denver and the City and County of Broomfield, have consolidated city and county governments.

Contents
Colorado counties
Historic counties
Colorado county minutiae
See also
References

Colorado counties


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 001, Belknap County, New Hampshire and Alachua County, Florida are also 001. To uniquely identify Adams County, Colorado, one must use the state code of 08 plus the county code of 001; therefore, the unique nationwide identifier for Adams County, Colorado is 08001. The links in the column FIPS County Code are to the Census Bureau Info page for that county.[1]
The 64 Counties of the State of Colorado
County
FIPS Code
County Seat
Colorado County Seats [2]
Created
Formed from
Colorado County Evolution
Origin of name
Population
Annual County Population Estimates and Estimated Components of Change: April 1, 2000 to July 1, 2006 (CO-EST2006-alldata)
Area
Colorado Counties Land and Population Density
Map
 

Historic counties


The sortable table below lists all the historic counties of the Territory of New Mexico, the Territory of Utah, the Territory of Kansas, and the extralegal Territory of Jefferson that previously existed within the boundaries of the present State of Colorado, as well as the three defunct counties of the Territory of Colorado and the three defunct counties of the State of Colorado. The table includes the following information:

★ The official name of the county,

★ The territory or state,

★ The date the county was created,

★ The date the county was abolished or excluded from the Territory of Colorado, and

★ Historical notes.
Counties formerly within the State of Colorado
County Territory or State Created Superseded History
Taos County Territory of New Mexico 185201091852-01-09 186102281861-02-28 One of the seven partidos of the province of Nuevo México. One of the nine original counties created by the Territory of New Mexico in 1852. Excluded from the Territory of Colorado in 1861.
Great Salt Lake County Territory of Utah 185203031852-03-03 186102281861-02-28 Created by the Territory of Utah in 1852. Excluded from the Territory of Colorado in 1861.
Iron County Territory of Utah 185203031852-03-03 186102281861-02-28 Created by the Territory of Utah in 1852. Excluded from the Territory of Colorado in 1861.
Sanpete County Territory of Utah 185203031852-03-03 186102281861-02-28 Created by the Territory of Utah in 1852. Excluded from the Territory of Colorado in 1861.
Utah County Territory of Utah 185203031852-03-03 186102281861-02-28 Created by the Territory of Utah in 1852. Excluded from the Territory of Colorado in 1861.
Washington County Territory of Utah 185203031852-03-03 186102281861-02-28 Created by the Territory of Utah in 1852. Excluded from the Territory of Colorado in 1861.
Green River County Territory of Utah 185203031852-03-03 186102281861-02-28 Created by the Territory of Utah in 1852. Dissolved in 1857, but recreated in 1859. Excluded from the Territory of Colorado in 1861 and the Territory of Wyoming in 1868. Finally dissolved in 1872.
Arapahoe County Territory of Kansas 185508251855-08-25 186101291861-01-29 Created by the Territory of Kansas in 1855, but never organized. Reverted to unorganized territory when Kansas joined the Union in 1861.
Beaver County Territory of Utah 185601051856-01-05 186102281861-02-28 Split from Iron and Millard counties in 1856. Excluded from the Territory of Colorado in 1861.
Broderick County Territory of Kansas 185902071859-02-07 186101291861-01-29 Split from Arapahoe County in 1859, but never organized. Reverted to unorganized territory when Kansas joined the Union in 1861.
El Paso County Territory of Kansas 185902071859-02-07 186101291861-01-29 Split from Arapahoe County in 1859, but never organized. Reverted to unorganized territory when Kansas joined the Union in 1861.
Fremont County Territory of Kansas 185902071859-02-07 186101291861-01-29 Split from Arapahoe County in 1859, but never organized. Reverted to unorganized territory when Kansas joined the Union in 1861.
Montana County Territory of Kansas 185902071859-02-07 186101291861-01-29 Split from Arapahoe County in 1859, but never organized. Reverted to unorganized territory when Kansas joined the Union in 1861.
Oro County Territory of Kansas 185902071859-02-07 186101291861-01-29 Split from Arapahoe County in 1859, but never organized. Reverted to unorganized territory when Kansas joined the Union in 1861.
Peketon County Territory of Kansas 185902071859-02-07 186101291861-01-29 Created by the Territory of Kansas in 1859, but never organized. Reverted to unorganized territory when Kansas joined the Union in 1861.
Arrappahoe County Territory of Jefferson 18591199November 1859 186102281861-02-28 One of the 12 counties created by the extralegal Territory of Jefferson in 1859.
Cheyenne County Territory of Jefferson 18591199November 1859 186102281861-02-28 One of the 12 counties created by the extralegal Territory of Jefferson in 1859.
El Paso County Territory of Jefferson 18591199November 1859 186102281861-02-28 One of the 12 counties created by the extralegal Territory of Jefferson in 1859.
Fountain County Territory of Jefferson 18591199November 1859 186102281861-02-28 One of the 12 counties created by the extralegal Territory of Jefferson in 1859.
Heele County Territory of Jefferson 18591199November 1859 186102281861-02-28 One of the 12 counties created by the extralegal Territory of Jefferson in 1859.
Jackson County Territory of Jefferson 18591199November 1859 186102281861-02-28 One of the 12 counties created by the extralegal Territory of Jefferson in 1859.
Jefferson County Territory of Jefferson 18591199November 1859 186102281861-02-28 One of the 12 counties created by the extralegal Territory of Jefferson in 1859.
Montana County Territory of Jefferson 18591199November 1859 186102281861-02-28 One of the 12 counties created by the extralegal Territory of Jefferson in 1859.
North County Territory of Jefferson 18591199November 1859 186102281861-02-28 One of the 12 counties created by the extralegal Territory of Jefferson in 1859.
Park County Territory of Jefferson 18591199November 1859 186102281861-02-28 One of the 12 counties created by the extralegal Territory of Jefferson in 1859.
Saratoga County Territory of Jefferson 18591199November 1859 186102281861-02-28 One of the 12 counties created by the extralegal Territory of Jefferson in 1859.
St. Vrains County Territory of Jefferson 18591199November 1859 186102281861-02-28 One of the 12 counties created by the extralegal Territory of Jefferson in 1859.
Mora County Territory of New Mexico 186002011860-02-01 186102281861-02-28 Split from Taos County in 1860. Excluded from the Territory of Colorado in 1861.
Guadalupe County Territory of Colorado 186111011861-11-01 186111071861-11-07 One of the 17 original counties created by the Territory of Colorado in 1861. The county was renamed Conejos County after only six days.
Greenwood County Territory of Colorado 187002111870-02-11 187402061874-02-06 Created from former Cheyenne and Arapaho tribal land and the eastern portion of Huerfano County in 1870. The county was abolished in 1874 and its territory split between Elbert County and Bent County.
Platte County Territory of Colorado 187202091872-02-09 187402091874-02-09 Created from the eastern portion of Weld County in 1872. The county was abolished in 1874 after organizers failed to secure voter approval. The territory of the county was returned to Weld County.
Carbonate County State of Colorado 187902081879-02-08 187902101879-02-10 Lake County was renamed Carbonate County in 1879. Only two days later, Carbonate County was split into the new Chaffee County and the renamed Lake County.
Uncompaghre County State of Colorado 188302271883-02-27 188303021883-03-02 Ouray County was renamed Uncompaghre County for only four days in 1883.
South Arapahoe County State of Colorado 190211151902-11-15 190304111903-04-11 One of three counties created from Arapahoe County in 1902. The name was changed back to Arapahoe County after five months.

No organized counties of the District of Louisiana, the Territory of Missouri, or the Territory of Nebraska existed within the present boundaries of the State of Colorado.

Colorado county minutiae



Larimer County is the home of the most ancient known archaeological site in the Rocky Mountain region. The Lindenmeier Site includes artifacts more than 13,000 years old.

Costilla County was the first area within the present State of Colorado to be settled by Europeans in 1851.

Taos County, created by the Territory of New Mexico in 1852, was the first organized county to extend into the area of the present State of Colorado.

Arapahoe County, created by the Territory of Kansas in 1855, was the first county created exclusively within the area of the present State of Colorado.

★ Of the 17 original counties created by the Territory of Colorado in 1861, only Gilpin County and Clear Creek County have retained their original boundaries.

Guadalupe County was the first Colorado county to be renamed in 1861.

Las Animas County was the first Colorado county to be created (in 1866) after the original 17 counties.

Greenwood County was the longest lived former Colorado county, existing four years from 1870 to 1874.

Carbonate County was the shortest lived former Colorado county, existing only two days in 1879 before being dissolved.

Las Animas County is the most extensive Colorado county.

★ The City and County of Broomfield is the least extensive Colorado county.

El Paso County is the most populous Colorado county.

San Juan County is the least populous Colorado county.

★ The City and County of Denver is the most densely populated Colorado county.

Hinsdale County is the least densely populated Colorado county.

Lake County has the highest point in Colorado at the summit of Mount Elbert at elevation (the highest point in the entire Rocky Mountains.)

Yuma County has the lowest point in Colorado where the Arikaree River flows into Kansas at elevation (the highest low point of any U.S. state.)

★ The following twelve Colorado counties have a county seat with the same name as the county:
County County Seat
Alamosa County City of Alamosa
Boulder County City of Boulder
BroomfieldCity and County of Broomfield City and County of Broomfield
Conejos County unincorporated town of Conejos
Delta County City of Delta
DenverCity and County of Denver City and County of Denver
Eagle County Town of Eagle
Gunnison County City of Gunnison
Montrose County City of Montrose
Ouray County City of Ouray
Pueblo County City of Pueblo
Saguache County Town of Saguache


★ Of all 64 Colorado counties, only Conejos County has a county seat that is not an incorporated municipality.

★ The name of each of the following two Colorado counties forms one part of the name of its county seat:
County County Seat
Cheyenne County Town of Cheyenne Wells
Morgan County City of Fort Morgan


Weld County has the most incorporated municipalities of any Colorado county with 31.

★ The following nine Colorado counties have no incorporated municipalities other than the county seat:
County County Seat
Archuleta County Town of Pagosa Springs
Bent County City of Las Animas
BroomfieldCity and County of Broomfield City and County of Broomfield
DenverCity and County of Denver City and County of Denver
Hinsdale County Town of Lake City
Jackson County Town of Walden
Lake County City of Leadville
Mineral County Town of Creede
San Juan County Town of Silverton


★ The City and County of Denver and the City and County of Broomfield are the only two Colorado counties with enclaves.

Arapahoe County, Boulder County, and Jefferson County are the only three dismembered Colorado counties with exclaves.

Delta County and the City and County of Denver each border only three counties.

Jefferson County borders ten counties.

See also



Colorado census statistical areas

Colorado metropolitan areas

Colorado municipalities

Geography of Colorado

History of Colorado

List of Colorado county name etymologies

State of Colorado

References


1. EPA County FIPS Code Listing
2. NACo - Find a county




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