Colorado

Colorado has 64 Counties.

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Colorado Counties, Inc.
800 Grant Street, Suite 500
Denver, CO 80203
Phone: (303)861-4076
Fax: (303)861-2818
http://www.ccionline.org

County NACo
Member
2010
Population
Square
Miles
County Seat Board
Size
Founded
Adams 441,603 1,168 Brighton   1901 
Alamosa 15,445 723 Alamosa   1913 
Arapahoe 572,003 798 Littleton   1861 
Archuleta 12,084 1,350 Pagosa Springs   1885 
Baca 3,788 2,555 Springfield   1889 
Bent 6,499 1,513 Las Animas   1870 
Boulder 294,567 726 Boulder   1861 
Broomfield* 55,889 33 Broomfield   10  2001 
Chaffee 17,809 1,013 Salida   1861 
Cheyenne   1,836 1,778 Cheyenne Wells   1889 
Clear Creek 9,088 395 Georgetown   1861 
Conejos 8,256 1,287 Conejos   1861 
Costilla 3,524 1,227 San Luis   1861 
Crowley 5,823 787 Ordway   1911 
Custer 4,255 739 Westcliffe   1877 
Delta 30,952 1,142 Delta   1883 
Denver*   600,158 153 Denver  13  1901 
Dolores 2,064 1,067 Dove Creek   1881 
Douglas 285,465 840 Castle Rock   1861 
Eagle 52,197 1,685 Eagle   1883 
El Paso 622,263 2,127 Colorado Springs   1861 
Elbert   23,086 1,851 Kiowa   1874 
Fremont 46,824 1,533 Canon City   1861 
Garfield 56,389 2,948 Glenwood Springs   1883 
Gilpin 5,441 150 Central City   1861 
Grand 14,843 1,846 Hot Sulphur Springs   1874 
Gunnison 15,324 3,239 Gunnison   1877 
Hinsdale 843 1,117 Lake City   1874 
Huerfano 6,711 1,591 Walsenburg   1861 
Jackson 1,394 1,614 Walden   1909 
Jefferson 534,543 764 Golden   1861 
Kiowa 1,398 1,768 Eads   1889 
Kit Carson 8,270 2,161 Burlington  1889 
La Plata 51,334 1,692 Durango   1874 
Lake   7,310 377 Leadville   1861 
Larimer 299,630 2,596 Fort Collins   1861 
Las Animas 15,507 4,773 Trinidad   1866 
Lincoln 5,467 2,578 Hugo   1889 
Logan 22,709 1,839 Sterling   1887 
Mesa 146,723 3,329 Grand Junction   1883 
Mineral 712 876 Creede   1893 
Moffat 13,795 4,743 Craig   1911 
Montezuma 25,535 2,030 Cortez   1889 
Montrose 41,276 2,241 Montrose   1883 
Morgan 28,159 1,280 Fort Morgan   1889 
Otero 18,831 1,262 La Junta   1889 
Ouray 4,436 542 Ouray   1877 
Park 16,206 2,194 Fairplay   1861 
Phillips 4,442 688 Holyoke   1889 
Pitkin 17,148 971 Aspen   1881 
Prowers 12,551 1,638 Lamar   1889 
Pueblo 159,063 2,386 Pueblo   1866 
Rio Blanco 6,666 3,221 Meeker   1889 
Rio Grande 11,982 912 Del Norte  1874 
Routt 23,509 2,362 Steamboat Springs   1877 
Saguache 6,108 3,169 Saguache   1866 
San Juan 699 387 Silverton   1876 
San Miguel 7,359 1,287 Telluride   1861 
Sedgwick 2,379 548 Julesburg   1889 
Summit 27,994 608 Breckenridge   1861 
Teller 23,350 557 Cripple Creek   1899 
Washington 4,814 2,518 Akron  1887 
Weld 252,825 3,987 Greeley  1861 
Yuma 10,043 2,364 Wray   1889 

  * Consolidated City-County Government