|
Adams |
Brighton |
1902-11-15 |
From Arapahoe
County. |
|
Alamosa |
Alamosa |
1913-03-08 |
From Costilla
County and Conejos County counties. |
|
Arapahoe |
Littleton |
1861-11-01 |
One of the
17 original counties of the Territory of Colorado. Renamed South
Arapahoe County November 15, 1902 to April 11,
1903. |
|
Archuleta |
Pagosa Springs |
1885-04-14 |
From Conejos
County. |
|
Baca |
Springfield |
1889-04-16 |
From Las Animas
County. |
|
Bent |
Las Animas |
1870-02-11 |
From Huerfano
County and former Cheyenne and Arapaho tribal land. |
|
Boulder |
Boulder |
1861-11-01 |
One of the
17 original counties of the Territory of Colorado. |
|
City and of Broomfield |
Broomfield |
2001-11-15 |
From Boulder, Adams, Jefferson,
and Weld counties. Reorganized as a consolidated
city and county. |
|
Chaffee |
Salida |
1879-02-10 |
From Carbonate
County. |
|
Cheyenne |
Cheyenne Wells |
1889-03-25 |
From Elbert and
Bent counties. |
|
Clear Creek |
Georgetown |
1861-11-01 |
One of the
17 original counties of the
Territory of Colorado. |
|
Conejos |
Conejos |
1861-11-01 |
Guadalupe County,
one of the 17 original counties of the Territory of Colorado,
was renamed Conejos County
after six days on November 7, 1861. |
|
Costilla |
San Luis |
1861-11-01 |
One of the
17 original counties of the Territory of Colorado. |
|
Crowley |
Ordway |
1911-05-29 |
From Otero County. |
|
Custer |
Westcliffe |
1877-03-09 |
From
Fremont County. |
|
Delta |
Delta |
1883-02-11 |
From Gunnison County. |
|
City and County of Denver |
Denver |
1902-11-15 |
The original
Arapahoe
County Seat
was From Arapahoe County
and reorganized as a
consolidated city and county. |
|
Dolores |
Dove Creek |
1881-03-04 |
From Ouray County. |
|
Douglas |
Castle Rock |
1861-11-01 |
One of the
17 original counties of the Territory of Colorado. |
|
Eagle |
Eagle |
1883-02-11 |
From Summit County. |
|
El Paso |
Colorado Springs |
1861-11-01 |
One of the
17 original counties of the Territory of Colorado. |
|
Elbert |
Kiowa |
1874-02-02 |
From Douglas County. |
|
Fremont |
Cañon City |
1861-11-01 |
One of the
17 original counties of the Territory of Colorado. |
|
Garfield |
Glenwood Springs |
1883-02-10 |
From Summit County. |
|
Gilpin |
Central City |
1861-11-01 |
One of the
17 original counties of the
Territory of Colorado. |
|
Grand |
Hot Sulphur Springs |
1874-02-02 |
From Summit County. |
|
Gunnison |
Gunnison |
1877-03-09 |
From Lake County. |
|
Hinsdale |
Lake City |
1874-02-10 |
From
Lake,
Conejos,
and
Costilla
counties. |
|
Huerfano |
Walsenburg |
1861-11-01 |
One of the
17 original counties of the Territory of Colorado. |
|
Jackson |
Walden |
1909-05-05 |
From Larimer County. |
|
Jefferson |
Golden |
1861-11-01 |
One of the
17 original counties of the Territory of Colorado. |
|
Kiowa |
Eads |
1889-04-11 |
From Bent County. |
|
Kit Carson
|
Burlington |
1889-04-11 |
From Elbert County. |
|
La Plata |
Durango |
1874-02-10 |
From
Lake and
Conejos
counties. |
|
Lake |
Leadville |
1861-11-01 |
One of the
17 original counties of the
Territory of Colorado.
Renamed
Carbonate County
for the two days from February 8–10, 1879. |
|
Larimer |
Fort Collins |
1861-11-01 |
One of the
17 original counties of the Territory of Colorado. |
|
Las Animas |
Trinidad |
1866-02-09 |
From Huerfano County. |
|
Lincoln |
Hugo |
1889-04-11 |
From
Elbert
and
Bent
counties. |
|
Logan |
Sterling |
1887-02-25 |
From Weld County. |
|
Mesa |
Grand Junction |
1883-02-14 |
From Gunnison County. |
|
Mineral |
Creede |
1893-03-27 |
From
Hinsdale,
Rio Grande,
and
Saguache
counties. |
|
Moffat |
Craig |
1911-02-27 |
From
Routt County. |
|
Montezuma |
Cortez |
1889-04-16 |
From La Plata County. |
|
Montrose |
Montrose |
1883-02-11 |
From Gunnison County. |
|
Morgan |
Fort Morgan |
1889-02-19 |
From
Weld County. |
|
Otero |
La Junta |
1889-03-25 |
From Bent County. |
|
Ouray |
Ouray |
1877-01-18 |
From
Hinsdale
and
Lake
counties. Renamed
Uncompaghre
from 1883-02-27, to 1883-03-02. |
|
Park |
Fairplay |
1861-11-01 |
One of the
17 original counties of the Territory of Colorado. |
|
Phillips |
Holyoke |
1889-03-27 |
From Logan County. |
|
Pitkin |
Aspen |
1881-02-23 |
From Gunnison County. |
|
Prowers |
Lamar |
1889-04-11 |
From Bent County. |
|
Pueblo |
Pueblo |
1861-11-01 |
One of the
17 original counties of the Territory of Colorado. |
|
Rio Blanco |
Meeker |
1889-03-25 |
From Garfield County. |
|
Rio Grande |
Del Norte |
1874-02-10 |
From
Costilla County
and
Conejos County
counties. |
|
Routt |
Steamboat Springs |
1877-01-29 |
From Grand County. |
|
Saguache |
Saguache |
1866-12-29 |
From
Lake and
Costilla
counties. |
|
San Juan |
Silverton |
1876-01-31 |
From Lake County. |
|
San Miguel |
Telluride |
1883-03-02 |
From San Juan County. |
|
Sedgwick |
Julesburg |
1889-04-09 |
From Logan County. |
|
Summit |
Breckenridge |
1861-11-01 |
One of the
17 original counties of the Territory of Colorado. |
|
Teller |
Cripple Creek |
1899-03-23 |
From
El Paso
and
Fremont
counties. |
|
Washington |
Akron |
1887-02-09 |
From Weld County. |
|
Weld |
Greeley |
1861-11-01 |
One of the
17 original counties of the Territory of Colorado. |
|
Yuma |
Wray |
1889-03-15 |
From Washington County. |
Colorado
History and Genealogy Project
