States101 
Colorado
State Facts
There are more men than women in Colorado. The overall gender ratio is 101 men to 100 women.
The Colorado flag was adopted on June 5, 1911. The flag has been ranked the 14th best U.S. flag by a leading Vexillology Organization.
The Colorado quarter was the 38th quarter released overall. The quarter was released on June 14, 2006.
Recent estimates put Colorado's population at around 5,356,000 people (22nd out of 56).The population density is 51.7 people per square mile (43rd out of 56).
Someone from Colorado is known as a Coloradan. View our List of Adjectival and Demonyms for all the States.
Colorado was the 38th state when it joined the United States on August 1, 1876. Prior to 1876, Colorado was known as "Colorado Territory."
Essential Colorado Facts
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CO
Postal Code
The Colorado postal code is CO. This abbreviation has been used since the USPS first established official codes in October 1963. -
Gender Ratio
Gender Ratio: 101 Men to 100 Women
Male Population: 2,691,159 men
Female Population: 2,664,707 women
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State Flag
The 4 main colors in the Colorado flag are #002868, #FFFFFF, #BF0A30, and #FFD700 -
State Quarter
The Colorado Quarter was released in June 06, 2006.
Total Mintage: 0.57 billion.
Engraver: Norman E. Nemeth -
Population and Area
Population: 5,355,866 people
Land Area: 103,642 square miles
Population Density: 5,355,866 people per square mile
Areas Codes in Colorado (6)
- 303
- 308
- 435
- 719
- 720
- 970
Colorado Counties (64)
| County | Top Cities |
|---|---|
| Adams County | Aurora, Brighton, Commerce City, Denver, Dupont, and Eastlake |
| Alamosa County | Alamosa, Hooper, and Mosca |
| Arapahoe County | Aurora, Bennett, Byers, Deer Trail, Denver, and Englewood |
| Archuleta County | Arboles, Chromo, and Pagosa Springs |
| Baca County | Campo, Pritchett, Springfield, Two Buttes, Vilas, and Walsh |
| Bent County | Fort Lyon, Hasty, Las Animas, and Mc Clave |
| Boulder County | Allenspark, Boulder, Eldorado Springs, Hygiene, Jamestown, and Lafayette |
| Broomfield County | Broomfield |
| Chaffee County | Buena Vista, Monarch, Nathrop, Poncha Springs, and Salida |
| Cheyenne County | Arapahoe, Cheyenne Wells, Kit Carson, and Wild Horse |
| Clear Creek County | Dumont, Empire, Georgetown, Idaho Springs, and Silver Plume |
| Conejos County | Antonito, Capulin, Conejos, La Jara, Manassa, and Romeo |
| Costilla County | Blanca, Chama, Fort Garland, Jaroso, San Luis, and Sanford |
| Crowley County | Crowley, Olney Springs, Ordway, and Sugar City |
| Custer County | Westcliffe and Wetmore |
| Delta County | Austin, Cedaredge, Cory, Delta, Eckert, and Hotchkiss |
| Denver County | Denver and Littleton |
| Dolores County | Cahone, Dove Creek, and Rico |
| Douglas County | Castle Rock, Franktown, Larkspur, Littleton, Lone Tree, and Louviers |
| Eagle County | Avon, Basalt, Bond, Burns, Eagle, and Edwards |
| Elbert County | Agate, Elbert, Elizabeth, Kiowa, Matheson, and Simla |
| El Paso County | Calhan, Cascade, Colorado Springs, Fountain, Green Mountain Falls, and Manitou Springs |
| Fremont County | Canon City, Coal Creek, Coaldale, Cotopaxi, Florence, and Hillside |
| Garfield County | Battlement Mesa, De Beque, Glenwood Springs, New Castle, Parachute, and Rifle |
| Gilpin County | Black Hawk, Central City, and Rollinsville |
| Grand County | Fraser, Granby, Grand Lake, Hot Sulphur Springs, Kremmling, and Parshall |
| Gunnison County | Almont, Cimarron, Crested Butte, Gunnison, Ohio City, and Parlin |
| Hinsdale County | Lake City |
| Huerfano County | Gardner, La Veta, and Walsenburg |
| Jackson County | Coalmont, Cowdrey, Rand, and Walden |
| Jefferson County | Arvada, Broomfield, Buffalo Creek, Conifer, Denver, and Evergreen |
| Kiowa County | Arlington, Eads, Haswell, and Sheridan Lake |
| Kit Carson County | Bethune, Burlington, Flagler, Seibert, Stratton, and Vona |
| Lake County | Climax, Granite, Leadville, and Twin Lakes |
| La Plata County | Bayfield, Durango, Hesperus, Ignacio, and Marvel |
| Larimer County | Bellvue, Berthoud, Drake, Estes Park, Fort Collins, and Glen Haven |
| Las Animas County | Aguilar, Boncarbo, Branson, Hoehne, Kim, and Model |
| Lincoln County | Arriba, Genoa, Hugo, Karval, Limon, and Rush |
| Logan County | Atwood, Crook, Fleming, Iliff, Merino, and Padroni |
| Mesa County | Clifton, Collbran, Fruita, Gateway, Glade Park, and Grand Junction |
| Mineral County | Creede |
| Moffat County | Craig, Dinosaur, Hamilton, Maybell, and Slater |
| Montezuma County | Cortez, Dolores, Lewis, Mancos, Mesa Verde National Park, and Pleasant View |
| Montrose County | Bedrock, Crawford, Montrose, Naturita, Nucla, and Olathe |
| Morgan County | Brush, Fort Morgan, Hillrose, Log Lane Village, Orchard, and Snyder |
| Otero County | Cheraw, Fowler, La Junta, Manzanola, Rocky Ford, and Swink |
| Ouray County | Ouray and Ridgway |
| Park County | Alma, Bailey, Como, Fairplay, Grant, and Guffey |
| Phillips County | Amherst, Haxtun, Holyoke, and Paoli |
| Pitkin County | Aspen, Carbondale, Meredith, Snowmass, Snowmass Village, and Woody Creek |
| Prowers County | Granada, Hartman, Holly, Lamar, and Wiley |
| Pueblo County | Avondale, Beulah, Boone, Colorado City, Pueblo, and Rye |
| Rio Blanco County | Meeker and Rangely |
| Rio Grande County | Del Norte, Homelake, Monte Vista, and South Fork |
| Routt County | Clark, Hayden, Oak Creek, Phippsburg, Steamboat Springs, and Toponas |
| Saguache County | Center, Crestone, Moffat, Saguache, Sargents, and Villa Grove |
| San Juan County | Silverton |
| San Miguel County | Egnar, Norwood, Ophir, Placerville, and Telluride |
| Sedgwick County | Julesburg, Ovid, and Sedgwick |
| Summit County | Breckenridge, Dillon, Frisco, and Silverthorne |
| Teller County | Cripple Creek, Divide, Florissant, Victor, and Woodland Park |
| Washington County | Akron, Anton, Cope, Lindon, Otis, and Woodrow |
| Weld County | Ault, Briggsdale, Carr, Dacono, Eaton, and Erie |
| Yuma County | Eckley, Idalia, Joes, Kirk, Vernon, and Wray |