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West county atlas

Colorado county map

Explore all 64 counties. Select a county to see its map, or download a copy for your next project.

2025 Census boundaries64 mapped unitsCapital: Denver
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Boundary map 100%
Labelled map of Colorado counties Adams CountyAlamosa CountyArapahoe CountyArchuleta CountyBaca CountyBent CountyBoulder CountyBroomfield CountyChaffee CountyCheyenne CountyClear Creek CountyConejos CountyCostilla CountyCrowley CountyCuster CountyDelta CountyDenver CountyDolores CountyDouglas CountyEagle CountyEl Paso CountyElbert CountyFremont CountyGarfield CountyGilpin CountyGrand CountyGunnison CountyHinsdale CountyHuerfano CountyJackson CountyJefferson CountyKiowa CountyKit Carson CountyLa Plata CountyLake CountyLarimer CountyLas Animas CountyLincoln CountyLogan CountyMesa CountyMineral CountyMoffat CountyMontezuma CountyMontrose CountyMorgan CountyOtero CountyOuray CountyPark CountyPhillips CountyPitkin CountyProwers CountyPueblo CountyRio Blanco CountyRio Grande CountyRoutt CountySaguache CountySan Juan CountySan Miguel CountySedgwick CountySummit CountyTeller CountyWashington CountyWeld CountyYuma County
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2025 U.S. Census boundaries. Zoom to reveal more names. Drag to pan when zoomed; use arrow keys, + and − with the map focused.

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SVG

SVG is editable vector artwork. PNG is a high-resolution image. PDF uses landscape Letter pages, with a separate key when needed.

Downloads contain the complete boundary map, independent of zoom. Crowded names use a numbered key. Numbered quiz maps use the county list / answer key (CSV). Boundary data (GeoJSON) · Reuse with source credit.

Roads, terrain & aerial imagery

Explore Colorado with a county boundary overlay. Choose a view to load the interactive map.

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Street names, terrain, or aerial photography with the county boundary in view.

Backgrounds load from OpenStreetMap or USGS only when selected. Imagery dates and detail vary by location.

Map scope: Use the boundary map for names and shapes, or the interactive background viewer for roads, terrain, and aerial imagery. County boundaries do not identify parcels or ZIP codes.

Colorado county geography overview

Colorado has 64 counties, which places it 24th among the 50 state and District of Columbia maps in this atlas when ordered by number of county-level units. Their combined 103,636.8 square miles of land place the state 8th by mapped land area.

The average county-level area is 1,619 square miles, while the median is 1,431 square miles. The median is often the better description of a typical unit because one or two very large areas can pull the average upward. The five largest units together account for about 19% of the state’s mapped land area.

64county-level units
1,431 sq mimedian land area
4,772.9 sq milargest unit
0%share of mapped area that is water

Largest and smallest Colorado counties

Las Animas County is the largest county-level unit by land area at 4,772.9 square miles. It represents about 5% of all mapped land in Colorado. At the other end of the range, Broomfield County has 33 square miles of land.

Largest by land area

  1. Las Animas County4,772.9 sq mi
  2. Moffat County4,743.2 sq mi
  3. Weld County3,985 sq mi
  4. Mesa County3,328.7 sq mi
  5. Gunnison County3,239.1 sq mi

Smallest by land area

  1. Broomfield County33 sq mi
  2. Gilpin County150 sq mi
  3. Denver County153.1 sq mi
  4. Lake County376.9 sq mi
  5. San Juan County387.5 sq mi

Rankings use land area rather than total area. This avoids making coastal or lake counties appear larger solely because their boundaries include extensive water.

Alphabetical list of Colorado counties

The table is alphabetical, so it works as a name and FIPS-code reference rather than an area ranking. Every identifier begins with the Colorado state FIPS prefix 08. Land and water figures are rounded to one decimal place.

64 county-level areas

Download county data / numbered map key (CSV)
No.NameFIPS codeLand areaWater area
1Adams County080011,166.8 sq mi16.8 sq mi
2Alamosa County08003722.6 sq mi0.6 sq mi
3Arapahoe County08005797.9 sq mi7.6 sq mi
4Archuleta County080071,350.1 sq mi5.3 sq mi
5Baca County080092,555 sq mi2.4 sq mi
6Bent County080111,512.8 sq mi28.2 sq mi
7Boulder County08013726.4 sq mi14.1 sq mi
8Broomfield County0801433 sq mi0.6 sq mi
9Chaffee County080151,013.4 sq mi1.5 sq mi
10Cheyenne County080171,778.3 sq mi3.2 sq mi
11Clear Creek County08019395.1 sq mi1.3 sq mi
12Conejos County080211,287.4 sq mi3.6 sq mi
13Costilla County080231,227.6 sq mi3.4 sq mi
14Crowley County08025787.4 sq mi12.9 sq mi
15Custer County08027738.6 sq mi1.3 sq mi
16Delta County080291,142.1 sq mi6.5 sq mi
17Denver County08031153.1 sq mi1.7 sq mi
18Dolores County080331,067.2 sq mi1 sq mi
19Douglas County08035840.9 sq mi2.6 sq mi
20Eagle County080371,684.5 sq mi7.3 sq mi
21El Paso County080412,126.4 sq mi2.7 sq mi
22Elbert County080391,850.1 sq mi0.2 sq mi
23Fremont County080431,533.8 sq mi0.9 sq mi
24Garfield County080452,947.4 sq mi8.4 sq mi
25Gilpin County08047150 sq mi0.4 sq mi
26Grand County080491,846.6 sq mi23 sq mi
27Gunnison County080513,239.1 sq mi20.5 sq mi
28Hinsdale County080531,117.2 sq mi5.9 sq mi
29Huerfano County080551,591 sq mi2.2 sq mi
30Jackson County080571,613.7 sq mi7.2 sq mi
31Jefferson County08059764.4 sq mi9.6 sq mi
32Kiowa County080611,767.8 sq mi18.2 sq mi
33Kit Carson County080632,160.8 sq mi0.9 sq mi
34La Plata County080671,689.7 sq mi9.9 sq mi
35Lake County08065376.9 sq mi7 sq mi
36Larimer County080692,595.7 sq mi38.2 sq mi
37Las Animas County080714,772.9 sq mi2.7 sq mi
38Lincoln County080732,577.7 sq mi8.8 sq mi
39Logan County080751,838.6 sq mi6.3 sq mi
40Mesa County080773,328.7 sq mi12.4 sq mi
41Mineral County08079875.8 sq mi2 sq mi
42Moffat County080814,743.2 sq mi7.6 sq mi
43Montezuma County080832,029.3 sq mi10.5 sq mi
44Montrose County080852,240.9 sq mi1.9 sq mi
45Morgan County080871,280.5 sq mi13.4 sq mi
46Otero County080891,261.9 sq mi7.8 sq mi
47Ouray County08091540.7 sq mi1.5 sq mi
48Park County080932,193.5 sq mi16.8 sq mi
49Phillips County08095687.9 sq mi0.1 sq mi
50Pitkin County08097970.7 sq mi2.5 sq mi
51Prowers County080991,638.4 sq mi5.9 sq mi
52Pueblo County081012,386.6 sq mi11.2 sq mi
53Rio Blanco County081033,221 sq mi1.9 sq mi
54Rio Grande County08105912 sq mi0.4 sq mi
55Routt County081072,362 sq mi6.1 sq mi
56Saguache County081093,168.6 sq mi1.7 sq mi
57San Juan County08111387.5 sq mi0.8 sq mi
58San Miguel County081131,286.7 sq mi2 sq mi
59Sedgwick County08115548 sq mi1.4 sq mi
60Summit County08117608.3 sq mi10.9 sq mi
61Teller County08119557.1 sq mi1.9 sq mi
62Washington County081212,518.1 sq mi5.9 sq mi
63Weld County081233,985 sq mi31.8 sq mi
64Yuma County081252,364.4 sq mi4.3 sq mi

How to read and use this map

County lines are administrative boundaries, not postal routes. A mailing address can use a city name associated with a neighboring area, and ZIP codes can cross county lines. When you need to identify a county for an address, confirm it with an official geocoder or local government source.

For classroom or planning use, download a PDF from the controls above. Labelled exports use numbered callouts for crowded areas; numbered quiz maps match the alphabetical county list. SVG files keep the boundary lines sharp at larger paper sizes.

Frequently asked questions

How many counties are in Colorado?

Colorado has 64 counties in the U.S. Census Bureau’s 2025 cartographic boundary file.

Can I print this Colorado county map?

Yes. Choose Download / print and select PDF for a landscape Letter page, PNG for an image, or SVG for editable vector artwork. Because the map is SVG, its boundary lines stay sharp when scaled.

What is the largest county in Colorado?

Las Animas County is the largest by land area in this dataset at 4,772.9 square miles. This is an area ranking, not a population ranking.

What is the smallest county in Colorado?

Broomfield County is the smallest by land area in this dataset at 33 square miles.

Are these legal survey boundaries?

No. This is a generalized reference map. Property, parcel, election, and legal boundary questions should be checked with the relevant state or local agency.

Map source

U.S. Census Bureau, 2025 Cartographic Boundary File, Counties, 1:5,000,000. Land and water area fields are supplied in the same file and converted from square meters to square miles. Accessed September 27, 2026.