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