USStateMap

Colorado County Map

Colorado has 64 counties. El Paso County, home to Colorado Springs, is the most populous with 730,395 residents in 2020, just ahead of Denver (715,522). Las Animas County on the New Mexico border is the largest by land area (4,772.9 sq mi), and the capital, Denver, is its own consolidated city and county.

County map of Colorado showing all 64 counties

County lines are switched on when the interactive map loads. Hover over a county to see its name, or untick Show counties to hide them.

64counties
730,395most populous: El Paso County
4,772.9 sq milargest: Las Animas County
33.0 sq mismallest: Broomfield County

List of Colorado counties

Click a column heading to sort. Land area excludes water.

CountyCounty seatPopulation (2020)Land area (sq mi)
Adams CountyBrighton519,5721,166.7
Alamosa CountyAlamosa16,376722.6
Arapahoe CountyLittleton655,070797.9
Archuleta CountyPagosa Springs13,3591,350.1
Baca CountySpringfield3,5062,555.0
Bent CountyLas Animas5,6501,512.8
Boulder CountyBoulder330,758726.4
Broomfield CountyBroomfield74,11233.0
Chaffee CountySalida19,4761,013.4
Cheyenne CountyCheyenne Wells1,7481,778.3
Clear Creek CountyGeorgetown9,397395.1
Conejos CountyConejos7,4611,287.4
Costilla CountySan Luis3,4991,227.6
Crowley CountyOrdway5,922787.4
Custer CountyWestcliffe4,704738.6
Delta CountyDelta31,1961,142.1
Denver CountyDenver715,522153.1
Dolores CountyDove Creek2,3261,067.2
Douglas CountyCastle Rock357,978840.2
Eagle CountyEagle55,7311,684.5
El Paso CountyColorado Springs730,3952,126.4
Elbert CountyKiowa26,0621,850.8
Fremont CountyCañon City48,9391,533.9
Garfield CountyGlenwood Springs61,6852,947.4
Gilpin CountyCentral City5,808150.0
Grand CountyHot Sulphur Springs15,7171,846.4
Gunnison CountyGunnison16,9183,239.1
Hinsdale CountyLake City7881,117.2
Huerfano CountyWalsenburg6,8201,591.0
Jackson CountyWalden1,3791,613.7
Jefferson CountyGolden582,910764.4
Kiowa CountyEads1,4461,767.8
Kit Carson CountyBurlington7,0872,160.8
La Plata CountyDurango55,6381,689.7
Lake CountyLeadville7,436376.9
Larimer CountyFort Collins359,0662,595.8
Las Animas CountyTrinidad14,5554,772.9
Lincoln CountyHugo5,6752,577.7
Logan CountySterling21,5281,838.6
Mesa CountyGrand Junction155,7033,328.7
Mineral CountyCreede865875.8
Moffat CountyCraig13,2924,743.2
Montezuma CountyCortez25,8492,029.3
Montrose CountyMontrose42,6792,240.9
Morgan CountyFort Morgan29,1111,280.5
Otero CountyLa Junta18,6901,261.9
Ouray CountyOuray4,874540.7
Park CountyFairplay17,3902,193.5
Phillips CountyHolyoke4,530687.9
Pitkin CountyAspen17,358970.7
Prowers CountyLamar11,9991,638.4
Pueblo CountyPueblo168,1622,386.6
Rio Blanco CountyMeeker6,5293,221.0
Rio Grande CountyDel Norte11,539912.0
Routt CountySteamboat Springs24,8292,362.0
Saguache CountySaguache6,3683,168.6
San Juan CountySilverton705387.5
San Miguel CountyTelluride8,0721,286.7
Sedgwick CountyJulesburg2,404548.0
Summit CountyBreckenridge31,055608.3
Teller CountyCripple Creek24,710557.1
Washington CountyAkron4,8172,518.1
Weld CountyGreeley328,9813,984.9
Yuma CountyWray9,9882,364.4

Most populous counties

The five most populous counties had 3,203,469 of Colorado’s 5,773,714 residents in 2020, or 55.5% of the state total.

  1. El Paso County: 730,395 (12.7%)
  2. Denver County: 715,522 (12.4%)
  3. Arapahoe County: 655,070 (11.3%)
  4. Jefferson County: 582,910 (10.1%)
  5. Adams County: 519,572 (9.0%)

Four of the top five (Denver, Arapahoe, Jefferson and Adams) are in the Denver metro area; El Paso County centers on Colorado Springs. At the other end, San Juan County had only 705 residents in 2020, the fewest in the state, followed by Hinsdale (788) and Mineral (865), all in the San Juan Mountains.

Largest and smallest counties

Las Animas County (4,772.9 sq mi of land) and Moffat County (4,743.2 sq mi), in the far northwest, are nearly tied as the largest. Weld County (3,984.9 sq mi), seated in Greeley, is third. The smallest is Broomfield County at just 33.0 sq mi of land, followed by Gilpin (150.0 sq mi) and Denver (153.1 sq mi). The average Colorado county covers 1,619.3 sq mi of land.

How counties work in Colorado

Most Colorado counties are run by an elected board of county commissioners, and each has a county seat where the courthouse and county offices are located. Two counties are different:

  • Denver is a consolidated city and county: one government serves as both, so the city of Denver and Denver County have the same boundaries.
  • Broomfield became Colorado’s 64th county in 2001, when the city of Broomfield was split off from Adams, Boulder, Jefferson and Weld counties into a consolidated city and county of its own.

Some county seats are small towns rather than the county’s largest city. Arapahoe County, the third most populous, is seated in Littleton, and Jefferson County in Golden.

Printable Colorado county maps

The labeled map shows every county name; the blank version has county lines only, for coloring or quizzes. Both are SVG files that print sharply at any size.

Labeled county map of Colorado
Labeled SVGBlank SVGState outline PNG

Frequently asked questions

How many counties are in Colorado?

Colorado has 64 counties. The newest, Broomfield, was created in 2001.

What is the largest county in Colorado?

By land area, Las Animas County (4,772.9 sq mi), just ahead of Moffat County (4,743.2 sq mi).

What is the most populous county in Colorado?

El Paso County, with 730,395 residents in 2020. Denver was a close second with 715,522.

What county is Denver in?

Denver is a consolidated city and county, so it is its own county, Denver County. Its suburbs extend into Adams, Arapahoe, Jefferson, Douglas and Broomfield counties.

Neighboring state county maps

Arizona · Kansas · Nebraska · New Mexico · Oklahoma · Utah · Wyoming

Back to the Colorado state map or browse all 50 state maps.

Sources: U.S. Census Bureau (2020 Census, 2020 Gazetteer, boundaries); county seats from Wikipedia and Wikidata, cross-checked. Last reviewed October 2026.