Explore Colorado’s 64 counties with a labeled county map, county seats, 2020 Census population figures and a complete alphabetical county list.
Colorado has 64 counties, stretching from the Rocky Mountains and Western Slope to the Front Range and eastern plains. Use this Colorado county map to locate county boundaries, compare county names, and find major county seats such as Denver, Colorado Springs, Golden and Fort Collins. Below you will find a state overview, a labeled county map, population comparisons and the complete alphabetical county list.
| Feature | Details |
|---|---|
| State Name | Colorado |
| State Abbreviation | CO |
| Capital City | Denver |
| Total Counties | 64 |
| State Nickname | Centennial State |
| Statehood | August 1, 1876 — 38th state |
| Population (2020 Census) | 5,773,714 |
| Land Area (2020 Census) | 103,637.06 square miles |
The map shows all 64 counties with their boundaries and names. Numbered labels identify smaller counties where a full name would be difficult to read. Denver is the state capital, and Colorado Springs is the county seat of El Paso County. County boundaries differ from city limits, so a city name and a county name are not always interchangeable.
These are Colorado’s seven most populous counties in the April 1, 2020 Census. The figures are census counts rather than current population estimates; using one reference year makes the counties comparable.
| County | County Seat | Population — 2020 Census |
|---|---|---|
| El Paso County | Colorado Springs | 730,395 |
| Denver County | Denver | 715,522 |
| Arapahoe County | Littleton | 655,070 |
| Jefferson County | Golden | 582,910 |
| Adams County | Brighton | 519,572 |
| Larimer County | Fort Collins | 359,066 |
| Douglas County | Castle Rock | 357,978 |
Colorado has 57 more counties. The full alphabetical list appears below. Larger population does not mean larger land area: Las Animas County has the greatest land area, while El Paso County had the largest population in the 2020 Census.
| Format | Download |
|---|---|
| PNG Map | Download Now |
| PDF Printable | Download Now |
| SVG Editable | Download Now |
| GIS Shapefile (ZIP) | Download Now |
❓ How many counties are in Colorado?
Colorado has 64 counties. The county map and alphabetical list above include all 64.
❓ What is the capital of Colorado?
Denver is Colorado’s capital. It is shown separately from neighboring Adams, Arapahoe and Jefferson counties on the county map.
❓ Which Colorado county has the largest population?
El Paso County had 730,395 residents in the 2020 Census, making it the most populous county in that census. Its county seat is Colorado Springs.
❓ What is the largest county in Colorado by land area?
Las Animas County is Colorado’s largest county by land area. Population rankings and land-area rankings describe different things.
❓ What county is Colorado Springs in?
Colorado Springs is in El Paso County and serves as its county seat.
❓ What county is Fort Collins in?
Fort Collins is in Larimer County and is its county seat.
❓ What county is Boulder in?
Boulder is in Boulder County. Boulder County’s county seat is also Boulder.
❓ How should I use a Colorado county map?
Start with a county name or a known county seat, then use the boundaries to identify nearby counties. This map is suitable for geographic reference and learning; it does not show property lines, road navigation or survey measurements.
County boundaries use U.S. Census Bureau TIGERweb, January 1, 2026 vintage, generalized for this reference map. County population figures use 2020 Census county counts. County seats are checked against the Colorado county-seat dataset. State population and land area are from Census QuickFacts; statehood and capital are documented by the Library of Congress. Different dates describe different datasets; the 2020 population figures are not presented as 2026 estimates.
