County Maps US

Colorado County Map

Colorado has 64 counties. Together they cover 103,637 sq mi of land and 6,012,561 people.

Neighbouring areas are given different colours so their shared borders read clearly. These colours carry no data.

Boundaries from the 2025 Census cartographic boundary file, generalised so that no point moves by more than half a pixel at this width. Select any area to open its page.
Counties
64
24th most of the 51 states and DC
Population
6,012,561
20th largest
Land area
103,637
square miles
Density
58.0
people per square mile, computed

Sources: US Census Bureau, Population Estimates Program, Vintage 2025 Population Estimates, released 26 March 2026; US Census Bureau, Gazetteer Files, 2025 Gazetteer Files, released 10 September 2025. Retrieved 30 August 2026.

Download this map

Free to use and redistribute. The boundaries are public-domain Census Bureau data; attribution to County Maps US is appreciated but not required.

Satellite view

Aerial imagery of Colorado with the state boundary drawn on top. County lines are not drawn here: at this scale they would bury the picture, and the map above already carries them.

Aerial view of Colorado from the USGS National Map, with its boundary outlined
Imagery: USGS National Map, USGS Imagery Only, public domain, requested from USGS by your browser when you reach this point on the page, at 800 by 611 pixels. The boundary is the 2025 Census cartographic boundary file, reprojected to Web Mercator to match the imagery. You can also open the USGS National Map viewer.

The extremes of Colorado

Most populous

El Paso County

757,040

Least populous

Hinsdale County

753

Largest by land area

Las Animas County

4,773 sq mi

Smallest by land area

Broomfield County

33.0 sq mi

Most densely populated

Denver County

4,838 per sq mi

Highest median household income

Douglas County

$149,594

Which is the largest county in Colorado? The answer depends on whether you mean area or population.

The counties, by shape

Every one, drawn to its own scale so the small ones stay recognisable. Shape alone is not a size comparison; the table below carries the areas.

What the map does not say

The counties of Colorado are nowhere near the same size. Las Animas County covers 4,773 sq mi of land, 144.8 times the 33.0 sq mi of Broomfield County. People are spread even less evenly: Denver County packs 4,838 per sq mi while Hinsdale County holds 0.67 per sq mi.

They were not drawn in one sitting either. Weld County dates to 1861, and the boundaries were still being redrawn when Broomfield County was organised in 2001, 140 years later. Founding years come from Wikidata and are worth checking against the county's own history before citing.

And 27 of the 64 counties here share their names with counties in other states, so searching by name alone can land in the wrong place; the A to Z index lists every duplicate.

All 64 counties of Colorado

Sortable on any column. This table doubles as the text alternative to the map above: every area is a link, in alphabetical order, whether or not the map renders.

The 64 counties of Colorado, with population, land area, density, median household income, county seat and FIPS code.
NamePopulationLand areaDensityMedian incomeSeatFIPS
Adams County554,6681,167 sq mi475 per sq mi$94,571Brighton08001
Alamosa County16,688722.6 sq mi23.1 per sq mi$55,397Alamosa08003
Arapahoe County673,820797.9 sq mi845 per sq mi$101,087Littleton08005
Archuleta County14,3061,350 sq mi10.6 per sq mi$83,065Pagosa Springs08007
Baca County3,3472,555 sq mi1.3 per sq mi$46,215Springfield08009
Bent County5,7161,513 sq mi3.8 per sq mi$50,179Las Animas08011
Boulder County328,560726.4 sq mi452 per sq mi$103,994Boulder08013
Broomfield County79,17433.0 sq mi2,402 per sq mi$123,874Broomfield08014
Chaffee County20,8311,013 sq mi20.6 per sq mi$84,132Salida08015
Cheyenne County1,7131,778 sq mi0.96 per sq mi$70,865Cheyenne Wells08017
Clear Creek County8,994395.1 sq mi22.8 per sq mi$94,577Georgetown08019
Conejos County7,5291,287 sq mi5.9 per sq mi$50,978Conejos08021
Costilla County3,6791,228 sq mi3.0 per sq mi$36,861San Luis08023
Crowley County5,677787.4 sq mi7.2 per sq mi$48,826Ordway08025
Custer County5,590738.6 sq mi7.6 per sq mi$72,674Westcliffe08027
Delta County32,1781,142 sq mi28.2 per sq mi$57,774Delta08029
Denver County740,613153.1 sq mi4,838 per sq mi$94,718Denver08031
Dolores County2,4661,067 sq mi2.3 per sq mi$64,907Dove Creek08033
Douglas County399,396840.9 sq mi475 per sq mi$149,594Castle Rock08035
Eagle County54,2911,684 sq mi32.2 per sq mi$104,096Eagle08037
El Paso County757,0402,126 sq mi356 per sq mi$90,363Colorado Springs08041
Elbert County30,5341,850 sq mi16.5 per sq mi$132,685Kiowa08039
Fremont County50,0391,534 sq mi32.6 per sq mi$62,664Cañon City08043
Garfield County63,4742,947 sq mi21.5 per sq mi$91,131Glenwood Springs08045
Gilpin County6,073150 sq mi40.5 per sq mi$95,361Central City08047
Grand County16,4961,847 sq mi8.9 per sq mi$88,612Hot Sulphur Springs08049
Gunnison County17,4393,239 sq mi5.4 per sq mi$84,527Gunnison08051
Hinsdale County7531,117 sq mi0.67 per sq mi$75,972Lake City08053
Huerfano County7,0111,591 sq mi4.4 per sq mi$52,526Walsenburg08055
Jackson County1,2111,614 sq mi0.75 per sq mi$47,667Walden08057
Jefferson County580,451764.4 sq mi759 per sq mi$110,656Golden08059
Kiowa County1,4121,768 sq mi0.80 per sq mi$58,618Eads08061
Kit Carson County7,0692,161 sq mi3.3 per sq mi$70,259Burlington08063
La Plata County56,8981,690 sq mi33.7 per sq mi$86,056Durango08067
Lake County7,552376.9 sq mi20.0 per sq mi$96,575Leadville08065
Larimer County377,2922,596 sq mi145 per sq mi$93,765Fort Collins08069
Las Animas County14,3914,773 sq mi3.0 per sq mi$52,074Trinidad08071
Lincoln County5,6452,578 sq mi2.2 per sq mi$62,861Hugo08073
Logan County20,6541,839 sq mi11.2 per sq mi$51,829Sterling08075
Mesa County162,8453,329 sq mi48.9 per sq mi$73,658Grand Junction08077
Mineral County910875.8 sq mi1.0 per sq mi$56,250Creede08079
Moffat County13,1224,743 sq mi2.8 per sq mi$73,849Craig08081
Montezuma County26,6782,029 sq mi13.1 per sq mi$65,244Cortez08083
Montrose County44,5912,241 sq mi19.9 per sq mi$72,120Montrose08085
Morgan County30,3061,280 sq mi23.7 per sq mi$73,278Fort Morgan08087
Otero County17,6831,262 sq mi14.0 per sq mi$54,037La Junta08089
Ouray County5,265540.7 sq mi9.7 per sq mi$91,020Ouray08091
Park County18,3142,194 sq mi8.4 per sq mi$103,670Fairplay08093
Phillips County4,420687.9 sq mi6.4 per sq mi$64,674Holyoke08095
Pitkin County16,625970.7 sq mi17.1 per sq mi$102,645Aspen08097
Prowers County11,8841,638 sq mi7.3 per sq mi$53,508Lamar08099
Pueblo County169,2772,387 sq mi70.9 per sq mi$64,010Pueblo08101
Rio Blanco County6,6833,221 sq mi2.1 per sq mi$65,473Meeker08103
Rio Grande County11,087912 sq mi12.2 per sq mi$64,411Del Norte08105
Routt County25,3292,362 sq mi10.7 per sq mi$106,489Steamboat Springs08107
Saguache County6,7323,169 sq mi2.1 per sq mi$50,082Saguache08109
San Juan County813387.5 sq mi2.1 per sq mi$77,824Silverton08111
San Miguel County7,7531,287 sq mi6.0 per sq mi$79,024Telluride08113
Sedgwick County2,247548 sq mi4.1 per sq mi$52,386Julesburg08115
Summit County31,517608.3 sq mi51.8 per sq mi$109,773Breckenridge08117
Teller County24,756557.1 sq mi44.4 per sq mi$85,361Cripple Creek08119
Washington County4,7322,518 sq mi1.9 per sq mi$67,167Akron08121
Weld County378,4263,985 sq mi95.0 per sq mi$97,097Greeley08123
Yuma County9,8962,364 sq mi4.2 per sq mi$60,545Wray08125

Sources: US Census Bureau, Population Estimates Program, Vintage 2025 Population Estimates, released 26 March 2026; US Census Bureau, Gazetteer Files, 2025 Gazetteer Files, released 10 September 2025; US Census Bureau, American Community Survey, American Community Survey 2020-2024 5-Year Estimates, released 29 January 2026; Wikidata (CC0), Wikidata. Retrieved 30 August 2026.

Looking for Colorado County?

Colorado is also the name of 1 county in other states. If you meant one of those rather than the state of Colorado, they are listed here.

The ten most populous

  1. El Paso County757,040
  2. Denver County740,613
  3. Arapahoe County673,820
  4. Jefferson County580,451
  5. Adams County554,668
  6. Douglas County399,396
  7. Weld County378,426
  8. Larimer County377,292
  9. Boulder County328,560
  10. Pueblo County169,277

Data on this page last rebuilt 30 August 2026. How these figures are produced.