Wikipedia:WikiProject Colorado/Counties

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The following Colorado county data is for use by WikiProject Colorado.

Colorado counties

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More information County, Date created ...
The 64 Counties of the State of Colorado
County[1] Date created[1] County seat[1] Population[2] 2020 population density[a] 2020 Area[b] Elevation[c] County website CDOT map Coordinates[d]
2021 rank 2021 estimate[e] Change 2020 Census Change 2010 Census Change 2000 Census Land Water Total Max[f] Min[g]
Adams County November 15, 1902 Brighton 5 522,140+0.49%519,572+17.66%441,603+26.87%348,076 445/sq mi
172/km2  		 1,166.7 sq mi
3,021.8 km2  		 16.9 sq mi
43.7 km2  		 1,183.6 sq mi
3,065.5 km2  		 5,668 ft
1728 m		 4,432 ft
1351 m		 Adams County map 39°52′27″N 104°20′16″W
Alamosa County March 08, 1913 Alamosa 31 16,547+1.04%16,376+6.03%15,445+3.21%14,965 22.66/sq mi
8.75/km2  		 722.6 sq mi
1,871.6 km2  		 0.6 sq mi
1.7 km2  		 723.2 sq mi
1,873.3 km2  		 14,351 ft
4374 m		 6,387 ft
1947 m		 Alamosa County map 37°34′22″N 105°47′18″W
Arapahoe County November 01, 1861 Littleton 3 654,900−0.03%655,070+14.52%572,003+17.01%488,829 821/sq mi
317/km2  		 797.9 sq mi
2,066.4 km2  		 7.6 sq mi
19.8 km2  		 805.5 sq mi
2,086.2 km2  		 6,218 ft
1895 m		 4,730 ft
1442 m		 Arapahoe County map 39°39′01″N 104°20′22″W
Archuleta County April 14, 1885 Pagosa Springs 34 13,790+3.23%13,359+10.55%12,084+22.13%9,894 9.89/sq mi
3.82/km2  		 1,350.1 sq mi
3,496.7 km2  		 5.3 sq mi
13.7 km2  		 1,355.4 sq mi
3,510.4 km2  		 13,308 ft
4056 m		 6,085 ft
1855 m		 Archuleta County map 37°11′37″N 107°02′53″W
Baca County April 16, 1889 Springfield 56 3,514+0.23%3,506−7.44%3,788−16.14%4,517 1.37/sq mi
0.53/km2  		 2,555.0 sq mi
6,617.4 km2  		 2.4 sq mi
6.1 km2  		 2,557.4 sq mi
6,623.5 km2  		 5,293 ft
1613 m		 3,458 ft
1054 m		 Baca County map 37°19′09″N 102°33′38″W
Bent County February 11, 1870 Las Animas 49 5,759+1.93%5,650−13.06%6,499+8.39%5,996 3.73/sq mi
1.44/km2  		 1,512.8 sq mi
3,918.3 km2  		 28.2 sq mi
73.1 km2  		 1,541.0 sq mi
3,991.4 km2  		 4,857 ft
1481 m		 3,671 ft
1119 m		 Bent County map 37°57′17″N 103°04′18″W
Boulder County November 01, 1861 Boulder 9 329,543−0.37%330,758+12.29%294,567+9.19%269,784 455/sq mi
176/km2  		 726.4 sq mi
1,881.3 km2  		 14.1 sq mi
36.5 km2  		 740.5 sq mi
1,917.8 km2  		 14,259 ft
4346 m		 4,717 ft
1438 m		 Boulder County map 40°05′33″N 105°21′28″W
City and County of Broomfield November 15, 2001 Broomfield 12 75,325+1.64%74,112+32.61%55,889+42.57%39,202 2,248/sq mi
868/km2  		 33.0 sq mi
85.4 km2  		 0.6 sq mi
1.5 km2  		 33.6 sq mi
86.9 km2  		 5,848 ft
1783 m		 4,691 ft
1430 m		 City and County of Broomfield map 39°57′15″N 105°03′10″W
Chaffee County February 10, 1879 Salida 26 20,074+3.07%19,476+9.36%17,809+9.59%16,250 19.22/sq mi
7.42/km2  		 1,013.4 sq mi
2,624.7 km2  		 1.5 sq mi
4.0 km2  		 1,014.9 sq mi
2,628.7 km2  		 14,427 ft
4397 m		 5,298 ft
1615 m		 Chaffee County map 38°44′48″N 106°11′38″W
Cheyenne County March 25, 1889 Cheyenne Wells 59 1,707−2.35%1,748−4.79%1,836−17.63%2,229 0.98/sq mi
0.38/km2  		 1,778.3 sq mi
4,605.7 km2  		 3.2 sq mi
8.2 km2  		 1,781.5 sq mi
4,613.9 km2  		 5,257 ft
1602 m		 3,740 ft
1140 m		 Cheyenne County map 38°49′41″N 102°36′12″W
Clear Creek County November 01, 1861 Georgetown 39 9,446+0.52%9,397+3.40%9,088−1.89%9,263 23.79/sq mi
9.18/km2  		 395.1 sq mi
1,023.2 km2  		 1.3 sq mi
3.3 km2  		 396.4 sq mi
1,026.5 km2  		 14,278 ft
4352 m		 5,075 ft
1547 m		 Clear Creek County map 39°41′21″N 105°38′40″W
Conejos County November 01, 1861 Conejos 41 7,612+2.02%7,461−9.63%8,256−1.71%8,400 5.80/sq mi
2.24/km2  		 1,287.4 sq mi
3,334.4 km2  		 3.6 sq mi
9.2 km2  		 1,291.0 sq mi
3,343.6 km2  		 13,179 ft
4017 m		 7,404 ft
2257 m		 Conejos County map 37°12′03″N 106°11′29″W
Costilla County November 01, 1861 San Luis 55 3,625+3.60%3,499−0.71%3,524−3.74%3,661 2.85/sq mi
1.10/km2  		 1,227.6 sq mi
3,179.5 km2  		 3.4 sq mi
8.8 km2  		 1,231.0 sq mi
3,188.3 km2  		 14,351 ft
4374 m		 7,375 ft
2248 m		 Costilla County map 37°16′40″N 105°25′42″W
Crowley County May 29, 1911 Ordway 47 6,012+1.52%5,922+1.70%5,823+5.60%5,514 7.52/sq mi
2.90/km2  		 787.4 sq mi
2,039.4 km2  		 12.9 sq mi
33.4 km2  		 800.3 sq mi
2,072.8 km2  		 5,228 ft
1593 m		 3,966 ft
1209 m		 Crowley County map 38°19′36″N 103°47′05″W
Custer County March 09, 1877 Westcliffe 51 5,045+7.25%4,704+10.55%4,255+21.29%3,508 6.37/sq mi
2.46/km2  		 738.6 sq mi
1,913.0 km2  		 1.3 sq mi
3.4 km2  		 739.9 sq mi
1,916.4 km2  		 14,246 ft
4342 m		 4,547 ft
1386 m		 Custer County map 38°06′31″N 105°22′03″W
Delta County February 11, 1883 Delta 18 31,661+1.49%31,196+0.79%30,952+11.24%27,824 27.3/sq mi
10.5/km2  		 1,142.1 sq mi
2,958.1 km2  		 6.5 sq mi
16.8 km2  		 1,148.6 sq mi
2,974.9 km2  		 11,396 ft
3474 m		 4,763 ft
1452 m		 Delta County map 38°51′41″N 107°51′48″W
City and County of Denver December 01, 1902 Denver 2 711,463−0.57%715,522+19.22%600,158+8.37%553,805 4,674/sq mi
1,805/km2  		 153.1 sq mi
396.5 km2  		 1.7 sq mi
4.3 km2  		 154.8 sq mi
400.8 km2  		 5,688 ft
1734 m		 4,803 ft
1464 m		 City and County of Denver map 39°45′43″N 104°52′34″W
Dolores County March 04, 1881 Dove Creek 57 2,397+3.05%2,326+12.69%2,064+11.93%1,844 2.18/sq mi
0.84/km2  		 1,067.2 sq mi
2,764.0 km2  		 1.0 sq mi
2.7 km2  		 1,068.2 sq mi
2,766.7 km2  		 14,252 ft
4344 m		 4,911 ft
1497 m		 Dolores County map 37°45′07″N 108°31′02″W
Douglas County November 01, 1861 Castle Rock 6 368,990+3.08%357,978+25.40%285,465+62.44%175,732 426/sq mi
164/km2  		 840.2 sq mi
2,176.2 km2  		 2.6 sq mi
6.8 km2  		 842.8 sq mi
2,183.0 km2  		 9,836 ft
2998 m		 5,242 ft
1598 m		 Douglas County map 39°19′47″N 104°55′47″W
Eagle County February 11, 1883 Eagle 15 55,727−0.01%55,731+6.77%52,197+25.40%41,623 33.1/sq mi
12.8/km2  		 1,684.5 sq mi
4,362.8 km2  		 7.3 sq mi
19.0 km2  		 1,691.8 sq mi
4,381.8 km2  		 14,011 ft
4271 m		 6,220 ft
1896 m		 Eagle County map 39°37′40″N 106°41′43″W
El Paso County November 01, 1861 Colorado Springs 1 737,867+1.02%730,395+17.38%622,263+20.38%516,934 343/sq mi
133/km2  		 2,126.4 sq mi
5,507.4 km2  		 2.7 sq mi
7.1 km2  		 2,129.1 sq mi
5,514.5 km2  		 14,115 ft
4302 m		 5,055 ft
1541 m		 El Paso County map 38°49′55″N 104°31′31″W
Elbert County February 02, 1874 Kiowa 21 27,128+4.09%26,062+12.89%23,086+16.27%19,855 14.08/sq mi
5.44/km2  		 1,850.8 sq mi
4,793.6 km2  		 0.2 sq mi
0.4 km2  		 1,851.0 sq mi
4,794.0 km2  		 7,374 ft
2248 m		 4,580 ft
1396 m		 Elbert County map 39°17′11″N 104°08′08″W
Fremont County November 01, 1861 Cañon City 16 49,661+1.48%48,939+4.52%46,824+1.48%46,140 31.9/sq mi
12.3/km2  		 1,533.9 sq mi
3,972.7 km2  		 0.9 sq mi
2.2 km2  		 1,534.8 sq mi
3,974.9 km2  		 13,110 ft
3996 m		 4,573 ft
1394 m		 Fremont County map 38°28′24″N 105°26′22″W
Garfield County February 10, 1883 Glenwood Springs 13 62,161+0.77%61,685+9.39%56,389+28.78%43,786 20.93/sq mi
8.08/km2  		 2,947.4 sq mi
7,633.8 km2  		 8.4 sq mi
21.7 km2  		 2,955.8 sq mi
7,655.5 km2  		 12,361 ft
3768 m		 4,471 ft
1363 m		 Garfield County map 39°36′01″N 107°54′19″W
Gilpin County November 01, 1861 Central City 48 5,873+1.12%5,808+6.75%5,441+14.64%4,746 38.7/sq mi
14.9/km2  		 150.0 sq mi
388.6 km2  		 0.4 sq mi
0.9 km2  		 150.4 sq mi
389.5 km2  		 13,300 ft
4054 m		 4,983 ft
1519 m		 Gilpin County map 39°51′27″N 105°31′21″W
Grand County February 02, 1874 Hot Sulphur Springs 32 15,860+0.91%15,717+5.89%14,843+19.38%12,433 8.51/sq mi
3.29/km2  		 1,846.4 sq mi
4,782.3 km2  		 23.1 sq mi
59.9 km2  		 1,869.5 sq mi
4,842.2 km2  		 13,559 ft
4133 m		 6,040 ft
1841 m		 Grand County map 40°06′09″N 106°07′05″W
Gunnison County March 09, 1877 Gunnison 30 17,281+2.15%16,918+10.40%15,324+9.46%14,000 5.22/sq mi
2.02/km2  		 3,239.1 sq mi
8,389.3 km2  		 20.5 sq mi
53.1 km2  		 3,259.6 sq mi
8,442.4 km2  		 14,279 ft
4352 m		 7,178 ft
2188 m		 Gunnison County map 38°39′59″N 107°01′55″W
Hinsdale County February 10, 1874 Lake City 63 781−0.89%788−6.52%843+6.44%792 0.71/sq mi
0.27/km2  		 1,117.2 sq mi
2,893.6 km2  		 5.9 sq mi
15.3 km2  		 1,123.1 sq mi
2,908.9 km2  		 14,321 ft
4365 m		 7,299 ft
2225 m		 Hinsdale County map 37°49′15″N 107°18′01″W
Huerfano County November 01, 1861 Walsenburg 44 6,920+1.47%6,820+1.62%6,711−14.61%7,859 4.29/sq mi
1.66/km2  		 1,591.0 sq mi
4,120.8 km2  		 2.2 sq mi
5.8 km2  		 1,593.2 sq mi
4,126.6 km2  		 14,326 ft
4366 m		 4,445 ft
1355 m		 Huerfano County map 37°41′05″N 104°57′38″W
Jackson County May 05, 1909 Walden 61 1,363−1.16%1,379−1.08%1,394−11.60%1,577 0.85/sq mi
0.33/km2  		 1,613.7 sq mi
4,179.5 km2  		 7.2 sq mi
18.8 km2  		 1,620.9 sq mi
4,198.3 km2  		 12,954 ft
3948 m		 4,865 ft
1483 m		 Jackson County map 40°39′58″N 106°20′32″W
Jefferson County November 01, 1861 Golden 4 579,581−0.57%582,910+9.05%534,543+1.73%525,449 763/sq mi
294/km2  		 764.4 sq mi
1,979.7 km2  		 9.7 sq mi
25.1 km2  		 774.1 sq mi
2,004.8 km2  		 11,589 ft
3532 m		 4,986 ft
1520 m		 Jefferson County map 39°35′09″N 105°15′02″W
Kiowa County April 11, 1889 Eads 60 1,452+0.41%1,446+3.43%1,398−13.81%1,622 0.82/sq mi
0.32/km2  		 1,767.8 sq mi
4,578.6 km2  		 18.2 sq mi
47.0 km2  		 1,786.0 sq mi
4,625.6 km2  		 4,697 ft
1432 m		 3,687 ft
1124 m		 Kiowa County map 38°26′00″N 102°44′26″W
Kit Carson County April 11, 1889 Burlington 43 6,950−1.93%7,087−14.30%8,270+3.21%8,013 3.28/sq mi
1.27/km2  		 2,160.8 sq mi
5,596.5 km2  		 0.9 sq mi
2.3 km2  		 2,161.7 sq mi
5,598.8 km2  		 5,297 ft
1615 m		 3,523 ft
1074 m		 Kit Carson County map 39°18′20″N 102°36′10″W
La Plata County February 10, 1874 Durango 14 56,250+1.10%55,638+8.38%51,334+16.78%43,957 32.9/sq mi
12.7/km2  		 1,689.7 sq mi
4,376.3 km2  		 9.9 sq mi
25.6 km2  		 1,699.6 sq mi
4,401.9 km2  		 14,093 ft
4296 m		 4,268 ft
1301 m		 La Plata County map 37°17′11″N 107°50′37″W
Lake County November 01, 1861 Leadville 42 7,407−0.39%7,436+1.72%7,310−6.45%7,814 19.73/sq mi
7.62/km2  		 376.9 sq mi
976.2 km2  		 7.0 sq mi
18.1 km2  		 383.9 sq mi
994.3 km2  		 14,440 ft
4401 m		 8,720 ft
2658 m		 Lake County map 39°12′08″N 106°20′42″W
Larimer County November 01, 1861 Fort Collins 7 362,533+0.97%359,066+19.84%299,630+19.14%251,494 138.3/sq mi
53.4/km2  		 2,595.8 sq mi
6,723.0 km2  		 38.2 sq mi
99.0 km2  		 2,634.0 sq mi
6,822.0 km2  		 13,573 ft
4137 m		 4,557 ft
1389 m		 Larimer County map 40°39′58″N 105°27′39″W
Las Animas County February 09, 1866 Trinidad 33 14,633+0.54%14,555−6.14%15,507+1.94%15,212 3.05/sq mi
1.18/km2  		 4,772.9 sq mi
12,361.9 km2  		 2.7 sq mi
6.9 km2  		 4,775.6 sq mi
12,368.8 km2  		 13,631 ft
4155 m		 4,317 ft
1316 m		 Las Animas County map 37°19′00″N 104°02′21″W
Lincoln County April 11, 1889 Hugo 50 5,688+0.23%5,675+3.80%5,467−10.22%6,089 2.20/sq mi
0.85/km2  		 2,577.7 sq mi
6,676.2 km2  		 8.8 sq mi
22.8 km2  		 2,586.5 sq mi
6,699.0 km2  		 5,973 ft
1821 m		 3,923 ft
1196 m		 Lincoln County map 38°59′13″N 103°30′53″W
Logan County February 25, 1887 Sterling 25 21,487−0.19%21,528−5.20%22,709+10.42%20,566 11.71/sq mi
4.52/km2  		 1,838.6 sq mi
4,761.9 km2  		 6.3 sq mi
16.4 km2  		 1,844.9 sq mi
4,778.3 km2  		 4,947 ft
1508 m		 3,428 ft
1045 m		 Logan County map 40°43′29″N 103°06′36″W
Mesa County February 14, 1883 Grand Junction 11 157,335+1.05%155,703+6.12%146,723+25.47%116,939 46.8/sq mi
18.1/km2  		 3,328.7 sq mi
8,621.3 km2  		 12.4 sq mi
32.0 km2  		 3,341.1 sq mi
8,653.3 km2  		 11,236 ft
3425 m		 4,337 ft
1322 m		 Mesa County map 39°01′05″N 108°28′04″W
Mineral County March 27, 1893 Creede 62 924+6.82%865+21.49%712−14.32%831 0.99/sq mi
0.38/km2  		 875.8 sq mi
2,268.2 km2  		 2.0 sq mi
5.2 km2  		 877.8 sq mi
2,273.4 km2  		 13,902 ft
4237 m		 7,549 ft
2301 m		 Mineral County map 37°40′07″N 106°55′27″W
Moffat County February 27, 1911 Craig 35 13,185−0.80%13,292−3.65%13,795+4.68%13,178 2.80/sq mi
1.08/km2  		 4,743.2 sq mi
12,284.9 km2  		 7.6 sq mi
19.8 km2  		 4,750.8 sq mi
12,304.7 km2  		 10,840 ft
3304 m		 4,993 ft
1522 m		 Moffat County map 40°37′07″N 108°12′27″W
Montezuma County April 16, 1889 Cortez 22 26,175+1.26%25,849+1.23%25,535+7.19%23,822 12.74/sq mi
4.92/km2  		 2,029.3 sq mi
5,256.0 km2  		 10.5 sq mi
27.2 km2  		 2,039.8 sq mi
5,283.2 km2  		 13,237 ft
4035 m		 4,639 ft
1414 m		 Montezuma County map 37°20′18″N 108°35′49″W
Montrose County February 11, 1883 Montrose 17 43,168+1.15%42,679+3.40%41,276+23.44%33,438 19.05/sq mi
7.35/km2  		 2,240.9 sq mi
5,804.0 km2  		 1.9 sq mi
4.9 km2  		 2,242.8 sq mi
5,808.9 km2  		 11,453 ft
3491 m		 4,711 ft
1436 m		 Montrose County map 38°24′10″N 108°16′13″W
Morgan County February 19, 1889 Fort Morgan 20 29,008−0.35%29,111+3.38%28,159+3.63%27,172 22.73/sq mi
8.78/km2  		 1,280.5 sq mi
3,316.4 km2  		 13.4 sq mi
34.7 km2  		 1,293.9 sq mi
3,351.1 km2  		 4,937 ft
1505 m		 3,989 ft
1216 m		 Morgan County map 40°15′45″N 103°48′35″W
Otero County March 25, 1889 La Junta 27 18,594−0.51%18,690−0.75%18,831−7.29%20,311 14.81/sq mi
5.72/km2  		 1,261.9 sq mi
3,268.4 km2  		 7.8 sq mi
20.1 km2  		 1,269.7 sq mi
3,288.5 km2  		 5,273 ft
1607 m		 3,809 ft
1161 m		 Otero County map 37°54′09″N 103°43′00″W
Ouray County January 18, 1877 Ouray 52 5,035+3.30%4,874+9.87%4,436+18.39%3,747 9.01/sq mi
3.48/km2  		 540.7 sq mi
1,400.3 km2  		 1.5 sq mi
4.0 km2  		 542.2 sq mi
1,404.3 km2  		 14,158 ft
4315 m		 6,315 ft
1925 m		 Ouray County map 38°09′19″N 107°46′09″W
Park County November 01, 1861 Fairplay 28 17,720+1.90%17,390+7.31%16,206+11.62%14,519 7.93/sq mi
3.06/km2  		 2,193.5 sq mi
5,681.2 km2  		 16.8 sq mi
43.5 km2  		 2,210.3 sq mi
5,724.7 km2  		 14,293 ft
4357 m		 5,826 ft
1776 m		 Park County map 39°07′08″N 105°43′02″W
Phillips County March 27, 1889 Holyoke 54 4,512−0.40%4,530+1.98%4,442−0.96%4,485 6.59/sq mi
2.54/km2  		 687.9 sq mi
1,781.7 km2  		 0.1 sq mi
0.3 km2  		 688.0 sq mi
1,782.0 km2  		 4,117 ft
1255 m		 3,582 ft
1092 m		 Phillips County map 40°35′38″N 102°21′27″W
Pitkin County February 23, 1881 Aspen 29 17,348−0.06%17,358+1.22%17,148+15.17%14,889 17.88/sq mi
6.90/km2  		 970.7 sq mi
2,514.1 km2  		 2.5 sq mi
6.5 km2  		 973.2 sq mi
2,520.6 km2  		 14,279 ft
4352 m		 5,695 ft
1736 m		 Pitkin County map 39°13′02″N 106°54′59″W
Prowers County April 11, 1889 Lamar 36 11,996−0.03%11,999−4.40%12,551−13.34%14,483 7.32/sq mi
2.83/km2  		 1,638.4 sq mi
4,243.5 km2  		 5.9 sq mi
15.3 km2  		 1,644.3 sq mi
4,258.8 km2  		 4,713 ft
1437 m		 3,346 ft
1020 m		 Prowers County map 37°57′18″N 102°23′36″W
Pueblo County November 01, 1861 Pueblo 10 169,622+0.87%168,162+5.72%159,063+12.42%141,490 70.5/sq mi
27.2/km2  		 2,386.6 sq mi
6,181.2 km2  		 11.2 sq mi
28.9 km2  		 2,397.8 sq mi
6,210.1 km2  		 12,352 ft
3765 m		 4,291 ft
1308 m		 Pueblo County map 38°10′24″N 104°30′46″W
Rio Blanco County March 25, 1889 Meeker 45 6,476−0.81%6,529−2.06%6,666+11.25%5,992 2.03/sq mi
0.78/km2  		 3,221.0 sq mi
8,342.3 km2  		 1.9 sq mi
4.9 km2  		 3,222.9 sq mi
8,347.2 km2  		 12,033 ft
3668 m		 5,062 ft
1543 m		 Rio Blanco County map 39°58′50″N 108°13′05″W
Rio Grande County February 10, 1874 Del Norte 37 11,408−1.14%11,539−3.70%11,982−3.57%12,425 12.65/sq mi
4.89/km2  		 912.0 sq mi
2,362.0 km2  		 0.4 sq mi
1.0 km2  		 912.4 sq mi
2,363.0 km2  		 13,209 ft
4026 m		 7,467 ft
2276 m		 Rio Grande County map 37°34′57″N 106°22′59″W
Routt County January 29, 1877 Steamboat Springs 23 25,091+1.06%24,829+5.61%23,509+19.46%19,679 10.51/sq mi
4.06/km2  		 2,362.0 sq mi
6,117.6 km2  		 6.1 sq mi
15.8 km2  		 2,368.1 sq mi
6,133.4 km2  		 12,185 ft
3714 m		 6,266 ft
1910 m		 Routt County map 40°29′03″N 106°59′27″W
Saguache County December 29, 1866 Saguache 46 6,471+1.62%6,368+4.26%6,108+3.46%5,904 2.01/sq mi
0.78/km2  		 3,168.6 sq mi
8,206.5 km2  		 1.7 sq mi
4.5 km2  		 3,170.3 sq mi
8,211.0 km2  		 14,300 ft
4359 m		 6,013 ft
1833 m		 Saguache County map 38°04′51″N 106°16′51″W
San Juan County January 31, 1876 Silverton 64 733+3.97%705+0.86%699+25.27%558 1.82/sq mi
0.70/km2  		 387.5 sq mi
1,003.7 km2  		 0.8 sq mi
2.0 km2  		 388.3 sq mi
1,005.7 km2  		 13,900 ft
4237 m		 7,683 ft
2342 m		 San Juan County map 37°45′50″N 107°40′34″W
San Miguel County March 02, 1883 Telluride 40 8,074+0.02%8,072+9.69%7,359+11.62%6,593 6.27/sq mi
2.42/km2  		 1,286.7 sq mi
3,332.6 km2  		 2.0 sq mi
5.2 km2  		 1,288.7 sq mi
3,337.8 km2  		 14,023 ft
4274 m		 5,308 ft
1618 m		 San Miguel County map 38°00′15″N 108°24′21″W
Sedgwick County April 09, 1889 Julesburg 58 2,336−2.83%2,404+1.05%2,379−13.40%2,747 4.39/sq mi
1.69/km2  		 548.0 sq mi
1,419.4 km2  		 1.4 sq mi
3.5 km2  		 549.4 sq mi
1,422.9 km2  		 4,127 ft
1258 m		 3,477 ft
1060 m		 Sedgwick County map 40°52′33″N 102°21′06″W
Summit County November 01, 1861 Breckenridge 19 30,941−0.37%31,055+10.93%27,994+18.82%23,560 51.0/sq mi
19.7/km2  		 608.3 sq mi
1,575.6 km2  		 10.9 sq mi
28.3 km2  		 619.2 sq mi
1,603.9 km2  		 14,278 ft
4352 m		 7,460 ft
2274 m		 Summit County map 39°38′02″N 106°06′58″W
Teller County March 23, 1899 Cripple Creek 24 24,926+0.87%24,710+5.82%23,350+13.68%20,541 44.4/sq mi
17.1/km2  		 557.1 sq mi
1,442.8 km2  		 1.9 sq mi
5.0 km2  		 559.0 sq mi
1,447.8 km2  		 13,065 ft
3982 m		 5,236 ft
1596 m		 Teller County map 38°52′56″N 105°09′42″W
Washington County February 09, 1887 Akron 53 4,861+0.91%4,817+0.06%4,814−2.19%4,922 1.91/sq mi
0.74/km2  		 2,518.1 sq mi
6,521.8 km2  		 5.9 sq mi
15.2 km2  		 2,524.0 sq mi
6,537.0 km2  		 5,433 ft
1656 m		 3,910 ft
1192 m		 Washington County map 39°58′14″N 103°12′06″W
Weld County November 01, 1861 Greeley 8 340,036+3.36%328,981+30.12%252,825+39.86%180,766 82.6/sq mi
31.9/km2  		 3,984.9 sq mi
10,321.0 km2  		 31.8 sq mi
82.4 km2  		 4,016.7 sq mi
10,403.4 km2  		 6,388 ft
1947 m		 3,959 ft
1207 m		 Weld County map 40°33′15″N 104°23′38″W
Yuma County March 15, 1889 Wray 38 9,941−0.47%9,988−0.55%10,043+2.00%9,846 4.22/sq mi
1.63/km2  		 2,364.4 sq mi
6,123.8 km2  		 4.3 sq mi
11.1 km2  		 2,368.7 sq mi
6,134.9 km2  		 4,447 ft
1355 m		 3,317 ft
1011 m		 Yuma County map 40°00′08″N 102°25′27″W
State of Colorado August 01, 1876 Denver State 5,812,069+0.66%5,773,714+14.80%5,029,196+16.92%4,301,262 55.7/sq mi
21.5/km2  		 103,641.9 sq mi
268,431.2 km2  		 451.8 sq mi
1,170.1 km2  		 104,093.7 sq mi
269,601.3 km2  		 14,440 ft
4401 m		 3,317 ft
1011 m		 State of Colorado map 38°59′50″N 105°32′52″W
Close

Notes

  1. [a]
    The population density per land area at the 2020 Census.[2][3]
  2. [b]
    The area of the county as determined by the United States Census Bureau.[3]
  3. [c]
    Elevations include an adjustment from the National Geodetic Vertical Datum of 1929 (NGVD 29) to the North American Vertical Datum of 1988 (NAVD 88).
  4. [d]
    The centroid coordinates of the county as determined by the United States Census Bureau.[3]
  5. [e]
    United States Census Bureau estimates of county population as of July 1, 2021[4]
  6. [f]
    The maximum elevation in the county.[5] See the List of Colorado county high points.
  7. [g]
    The minimum elevation in the county. Only a few of these county low points have been verified.

References

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