Colorado is one of the famous states in the United States having over 64 counties. Two counties (Denver and Broomfield) operate as consolidated city-counties, this means they are both both a city and a county.
In Colorado, Las Animas County is the largest county by land area while the Broomfield County is the smallest. At the same time, El Paso County is the most populous in the state.
Colorado counties were first established as early as the 18th with 17 original counties created in 1861.
List of Colorado (CO) counties in alphabetically
Adams County
Alamosa County
Arapahoe County
Archuleta County
Baca County
Bent County
Boulder County
Chaffee County
Cheyenne County
City and County of Broomfield
City and County of Denver
Clear Creek County
Conejos County
Costilla County
Crowley County
Custer County
Delta County
Dolores County
Douglas County
Eagle County
El Paso County
Elbert County
Fremont County
Garfield County
Gilpin County
Grand County
Gunnison County
Hinsdale County
Huerfano County
Jackson County
Jefferson County
Kiowa County
Kit Carson County
La Plata County
Lake County
Larimer County
Las Animas County
Lincoln County
Logan County
Mesa County
Mineral County
Moffat County
Montezuma County
Montrose County
Morgan County
Otero County
Ouray County
Park County
Phillips County
Pitkin County
Prowers County
Pueblo County
Rio Blanco County
Rio Grande County
Routt County
Saguache County
San Juan County
San Miguel County
Sedgwick County
Summit County
Teller County
Washington County
Weld County
Yuma County
List of California (CO) counties printable and scannable
Adams County, Alamosa County, Arapahoe County, Archuleta County
Baca County, Bent County, Boulder
County, Chaffee County, Cheyenne County, City and County of Broomfield, City and County of Denver, Clear Creek County, Conejos County, Costilla County, Crowley County, Custer County
Delta County, Dolores County, Douglas County, Eagle County, El Paso County, Elbert County
Fremont County
Garfield County, Gilpin County, Grand County, Gunnison County
Hinsdale County, Huerfano County
Jackson County, Jefferson County
Kiowa County, Kit Carson County
La Plata County, Lake County, Larimer County, Las Animas County, Lincoln County, Logan County
Mesa County, Mineral County, Moffat County, Montezuma County, Montrose County, Morgan County
Otero County, Ouray County
Park County, Phillips County, Pitkin County, Prowers County, Pueblo County
Rio Blanco County, Rio Grande County, Routt County
Saguache County, San Juan County, San Miguel County, Sedgwick County, Summit County
Teller County
Washington County, Weld County
Yuma County
List of Colorado (CO) counties and their size
Las Animas County (4,773 sq mi)
Moffat County (4,746 sq mi )
Rio Blanco County (3,223 sq mi)
Garfield County (2,956 sq mi)
Weld County (3,987 sq mi)
Mesa County (3,328 sq mi)
Gunnison County (3,260 sq mi)
Saguache County (3,170 sq mi)
Park County (2,211 sq mi)
Routt County (2,368 sq mi)
San Miguel County (1,289 sq mi)
Eagle County (1,692 sq mi)
Pitkin County (973 sq mi)
Montrose County (2,247 sq mi)
Delta County (1,149 sq mi)
El Paso County (2,130 sq mi)
Hinsdale County (1,123 sq mi)
Archuleta County (1,356 sq mi)
Chaffee County (1,015 sq mi)
Fremont County (1,533 sq mi)
Larimer County (2,634 sq mi)
Teller County (559 sq mi)
Grand County (1,868 sq mi)
Montezuma County 2,040 sq mi
San Juan County (388 sq mi)
Lake County (384 sq mi)
Clear Creek County (396 sq mi)
Custer County (739 sq mi)
Ouray County (542 sq mi)
Pueblo County (2,398 sq mi)
Huerfano County (1,593 sq mi)
Costilla County (1,227 sq mi)
Conejos County (1,291 sq mi)
Alamosa County (723 sq mi)
Bent County (1,541 sq mi)
Otero County (1,270 sq mi)
Baca County (2,558 sq mi)
Prowers County (1,644 sq mi)
Kiowa County (1,785 sq mi)
Cheyenne County (1,781 sq mi)
Lincoln County (2,586 sq mi)
Elbert County (1,851 sq mi)
Douglas County (843 sq mi)
Adams County (1,182 sq mi)
Arapahoe County (804 sq mi)
Jefferson County (774 sq mi)
Boulder County (740 sq mi)
Gilpin County (150 sq mi)
Denver County (154 sq mi)
Broomfield County (34 sq mi) (smallest)
List of California counties and their county seats
Adams County, CO (Brighton)
Alamosa County, CO (Alamosa)
Arapahoe County, CO (Littleton)
Archuleta County, CO (Pagosa Springs)
Baca County, CO (Springfield)
Bent County, CO (Las Animas)
Boulder County, CO (Boulder)
Broomfield County, CO (Broomfield)
Chaffee County, CO (Salida)
Cheyenne County, CO (Cheyenne Wells)
Clear Creek County, CO (Georgetown)
Conejos County, CO (Conejos)
Costilla County, CO (San Luis)
Crowley County, CO (Ordway)
Custer County, CO (Westcliffe)
Delta County, CO (Delta)
Denver County, CO (Denver)
Dolores County, CO (Dove Creek)
Douglas County, CO (Castle Rock)
Eagle County, CO (Eagle)
Elbert County, CO (Kiowa)
El Paso County, CO (Colorado Springs) Fremont County, CO (Cañon City)
Garfield County, CO (Glenwood Springs)
Gilpin County, CO (Central City)
Grand County, CO (Hot Sulphur Springs)
Gunnison County, CO (Gunnison)
Hinsdale County, CO (Lake City)
Huerfano County, CO (Walsenburg)
Jackson County, CO (Walden)
Jefferson County, CO (Golden)
Kiowa County, CO (Eads)
Kit Carson County, CO (Burlington)
Lake County, CO (Leadville)
La Plata County, CO (Durango)
Larimer County, CO (Fort Collins)
Las Animas County, CO (Trinidad)
Lincoln County, CO (Hugo)
Logan County, CO (Sterling)
Mesa County, CO (Grand Junction)
Mineral County, CO (Creede)
Moffat County, CO (Craig)
Montezuma County, CO (Cortez)
Montrose County, CO (Montrose)
Morgan County, CO (Fort Morgan)
Otero County, CO (La Junta)
Ouray County, CO (Ouray)
Park County, CO (Fairplay)
Phillips County, CO (Holyoke)
Pitkin County, CO (Aspen)
Prowers County, CO (Lamar)
Pueblo County, CO (Pueblo)
Rio Blanco County, CO (Meeker)
Rio Grande County, CO (Del Norte)
Routt County, CO (Steamboat Springs)
Saguache County, CO (Saguache)
San Juan County, CO (Silverton)
San Miguel County, CO (Telluride)
Sedgwick County, CO (Julesburg)
Summit County, CO (Breckenridge)
Teller County, CO (Cripple Creek)
Washington County, CO (Akron)
Weld County, CO (Greeley)
Yuma County, CO (Wray)
Interesting stuffs in Colorado
Here are some interesting places to visit in Colorado:
Breckenridge
Mount Evans Scenic Byway
Glenwood Springs
Colorado National Monument
Maroon Bells
Durango & Si
lverton Narrow Gauge Railroad
Steamboat Springs
Royal Gorge Bridge & Park
Black Canyon of the Gunnison National Park
Great Sand Dunes National Par
Rocky Mountain National Park
Garden of the Gods
Mesa Verde National Park
Vail Ski Resort
The Mile High City
Trail Ridge Road.