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S.N. | County | FIPS Code | County Seat | Est. | Population | Area (sq mi) | Area (km2) |
---|---|---|---|---|---|---|---|
1 | Adams County | 1 | Brighton | 1902-11-15 | 441,603 | 1,182.29 | 3,062 |
2 | Alamosa County | 3 | Alamosa | 1913-03-08 | 15,445 | 723.21 | 1,873 |
3 | Arapahoe County | 5 | Littleton | 1861-11-01 | 572,003 | 804.41 | 2,083 |
4 | Archuleta County | 7 | Pagosa Springs | 1885-04-14 | 12,084 | 1,354.53 | 3,508 |
5 | Baca County | 9 | Springfield | 1889-04-16 | 3,788 | 2,558.48 | 6,626 |
6 | Bent County | 11 | Las Animas | 1870-02-11 | 6,499 | 1,541.07 | 3,991 |
7 | Boulder County | 13 | Boulder | 1861-11-01 | 294,567 | 740.48 | 1,918 |
8 | City and County of Broomfield | 14 | Broomfield | 2001-11-15 | 55,889 | 33.57 | 87 |
9 | Chaffee County | 15 | Salida | 1879-02-10 | 17,809 | 1,014.12 | 2,627 |
10 | Cheyenne County | 17 | Cheyenne Wells | 1889-03-25 | 1,836 | 1,781.90 | 4,615 |
11 | Clear Creek County | 19 | Georgetown | 1861-11-01 | 9,088 | 396.53 | 1,027 |
12 | Conejos County | 21 | Conejos | 1861-11-01 | 8,256 | 1,290.22 | 3,342 |
13 | Costilla County | 23 | San Luis | 1861-11-01 | 3,524 | 1,229.38 | 3,184 |
14 | Crowley County | 25 | Ordway | 1911-05-29 | 5,823 | 800.27 | 2,073 |
15 | Custer County | 27 | Westcliffe | 1877-03-09 | 4,255 | 739.24 | 1,915 |
16 | Delta County | 29 | Delta | 1883-02-11 | 30,952 | 1,149.44 | 2,977 |
17 | City and County of Denver | 31 | Denver | 1902-12-01 | 600,158 | 155.66 | 403 |
18 | Dolores County | 33 | Dove Creek | 1881-03-04 | 2,064 | 1,076.93 | 2,789 |
19 | Douglas County | 35 | Castle Rock | 1861-11-01 | 285,465 | 842.3 | 2,182 |
20 | Eagle County | 37 | Eagle | 1883-02-11 | 52,197 | 1,700.76 | 4,405 |
21 | El Paso County | 41 | Colorado Springs | 1861-11-01 | 622,263 | 2,128.60 | 5,513 |
22 | Elbert County | 39 | Kiowa | 1874-02-02 | 23,086 | 1,849.08 | 4,789 |
23 | Fremont County | 43 | Cañon City | 1861-11-01 | 46,824 | 1,533.09 | 3,971 |
24 | Garfield County | 45 | Glenwood Springs | 1883-02-10 | 56,389 | 2,958.23 | 7,662 |
25 | Gilpin County | 47 | Central City | 1861-11-01 | 5,441 | 150.15 | 389 |
26 | Grand County | 49 | Hot Sulphur Springs | 1874-02-02 | 14,843 | 1,868.53 | 4,839 |
27 | Gunnison County | 51 | Gunnison | 1877-03-09 | 15,324 | 3,259.22 | 8,441 |
28 | Hinsdale County | 53 | Lake City | 1874-02-10 | 843 | 1,123.35 | 2,909 |
29 | Huerfano County | 55 | Walsenburg | 1861-11-01 | 6,711 | 1,592.37 | 4,124 |
30 | Jackson County | 57 | Walden | 1909-05-05 | 1,394 | 1,619.75 | 4,195 |
31 | Jefferson County | 59 | Golden | 1861-11-01 | 534,543 | 772.85 | 2,002 |
32 | Kiowa County | 61 | Eads | 1889-04-11 | 1,398 | 1,785.90 | 4,625 |
33 | Kit Carson County | 63 | Burlington | 1889-04-11 | 8,270 | 2,162.43 | 5,601 |
34 | La Plata County | 67 | Durango | 1874-02-10 | 51,334 | 1,700.44 | 4,404 |
35 | Lake County | 65 | Leadville | 1861-11-01 | 7,310 | 383.55 | 993 |
36 | Larimer County | 69 | Fort Collins | 1861-11-01 | 299,630 | 2,631.75 | 6,816 |
37 | Las Animas County | 71 | Trinidad | 1866-02-09 | 15,507 | 4,773.27 | 12,363 |
38 | Lincoln County | 73 | Hugo | 1889-04-11 | 5,467 | 2,585.21 | 6,696 |
39 | Logan County | 75 | Sterling | 1887-02-25 | 22,709 | 1,845.31 | 4,779 |
40 | Mesa County | 77 | Grand Junction | 1883-02-14 | 146,723 | 3,345.69 | 8,665 |
41 | Mineral County | 79 | Creede | 1893-03-27 | 712 | 878.16 | 2,274 |
42 | Moffat County | 81 | Craig | 1911-02-27 | 13,795 | 4,755.86 | 12,318 |
43 | Montezuma County | 83 | Cortez | 1889-04-16 | 25,535 | 2,035.80 | 5,273 |
44 | Montrose County | 85 | Montrose | 1883-02-11 | 41,276 | 2,246.43 | 5,818 |
45 | Morgan County | 87 | Fort Morgan | 1889-02-19 | 28,159 | 1,293.83 | 3,351 |
46 | Otero County | 89 | La Junta | 1889-03-25 | 18,831 | 1,267.66 | 3,283 |
47 | Ouray County | 91 | Ouray | 1877-01-18 | 4,436 | 542.3 | 1,405 |
48 | Park County | 93 | Fairplay | 1861-11-01 | 16,206 | 2,209.36 | 5,722 |
49 | Phillips County | 95 | Holyoke | 1889-03-27 | 4,442 | 688.3 | 1,783 |
50 | Pitkin County | 97 | Aspen | 1881-02-23 | 17,148 | 970.37 | 2,513 |
51 | Prowers County | 99 | Lamar | 1889-04-11 | 12,551 | 1,645.37 | 4,261 |
52 | Pueblo County | 101 | Pueblo | 1861-11-01 | 159,063 | 2,396.77 | 6,208 |
53 | Rio Blanco County | 103 | Meeker | 1889-03-25 | 6,666 | 3,226.24 | 8,356 |
54 | Rio Grande County | 105 | Del Norte | 1874-02-10 | 11,982 | 913.1 | 2,365 |
55 | Routt County | 107 | Steamboat Springs | 1877-01-29 | 23,509 | 2,362.11 | 6,118 |
56 | Saguache County | 109 | Saguache | 1866-12-29 | 6,108 | 3,168.32 | 8,206 |
57 | San Juan County | 111 | Silverton | 1876-01-31 | 699 | 388.99 | 1,007 |
58 | San Miguel County | 113 | Telluride | 1883-03-02 | 7,359 | 1,290.76 | 3,343 |
59 | Sedgwick County | 115 | Julesburg | 1889-04-09 | 2,379 | 548.83 | 1,421 |
60 | Summit County | 117 | Breckenridge | 1861-11-01 | 27,994 | 618.92 | 1,603 |
61 | Teller County | 119 | Cripple Creek | 1899-03-23 | 23,350 | 558.58 | 1,447 |
62 | Washington County | 121 | Akron | 1887-02-09 | 4,814 | 2,522.90 | 6,534 |
63 | Weld County | 123 | Greeley | 1861-11-01 | 252,825 | 4,013.84 | 10,396 |
64 | Yuma County | 125 | Wray | 1889-03-15 | 10,043 | 2,369.61 | 6,137 |