Gunnison County, Colorado
County seat: Gunnison · Population 17,439 (2025) · 3,239 sq mi
Gunnison County is the 29th most populous of Colorado's 64 counties, with 17,439 people (2025 estimate). Its county seat is Gunnison. It is part of the Region 10: Central Western Slope region, one of the 14 Planning and Management Regions of Colorado. The map shows its 5 cities and towns and the 8 neighboring counties.
Gunnison County facts
- County seat
- Gunnison
- Population (2025 estimate)
- 17,439 +3.1% since 2020
- Land area
- 3,239 sq mi 5th largest of 64
- Water area
- 21 sq mi
- Population density
- 5 per sq mi
- Established
- 1877
- Named after
- John Williams Gunnison American explorer (1812-1853)
- Largest city
- Gunnison 6,836
- Median household income
- $84,527
- Cities and towns
- 5 plus 1 CDPs
- ZIP codes
- 12
- Time zone
- Mountain
- FIPS code
- 08051
Cities and towns in Gunnison County
Gunnison County has 5 incorporated cities, towns and villages. Populations count the people living inside Gunnison County; cities that cross a county line also list the other counties.
| Name | Type | Population 2025 | Also in |
|---|---|---|---|
| Gunnison (county seat) | City | 6,836 | |
| Crested Butte | Town | 1,693 | |
| Mount Crested Butte | Town | 966 | |
| Marble | Town | 133 | |
| Pitkin | Town | 74 |
Unincorporated communities (CDPs)
Census-designated places are communities without their own city government; the county provides their services.
| Community | Population | Also in |
|---|---|---|
| Somerset | 79 |
ZIP codes in Gunnison County
12 ZIP codes reach into Gunnison County. ZIP codes ignore county lines, so some also cover a neighboring county.
- 81210
- 81220 also Montrose County
- 81224
- 81225
- 81230 also Saguache County
- 81237
- 81239
- 81241
- 81243
- 81248 also Saguache County
- 81434 also Delta County
- 81623 also Pitkin, Garfield and Eagle counties
Population of Gunnison County, 2020–2025
Gunnison County grew by 518 people (+3.1%) between April 2020 and July 2025: 257 more births than deaths and a net gain of 271 people from migration.
| Year (July 1) | Population |
|---|---|
| 2020 | 16,950 |
| 2021 | 17,291 |
| 2022 | 17,324 |
| 2023 | 17,359 |
| 2024 | 17,407 |
| 2025 | 17,439 |
Neighboring counties
- Chaffee County east · 20,831 people
- Pitkin County north · 16,625 people
- Saguache County southeast · 6,732 people
- Delta County west · 32,178 people
- Montrose County west · 44,591 people
- Hinsdale County south · 753 people
- Ouray County southwest · 5,265 people
- Mesa County west · 162,845 people
Printable Gunnison County map
The PDF is a vector file with real text: it prints sharp on Letter paper and you can search it for a town. The PNG is 2400 pixels wide for slides and documents. Both are free to use with a credit to WhichCounty.
- PDF (Letter) (128 KB)
- PNG (2400 px) (93 KB)
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Sources
- Boundaries: U.S. Census Bureau, 2025 Cartographic Boundary Files (1:500,000).
- Population: Census Bureau county and city estimates, Vintage 2025. CDP populations: American Community Survey 2020–2024.
- Places and ZIP codes: Census Bureau 2026 Gazetteer and 2020 ZIP Code Tabulation Area relationship files.
- County seat, founding year and name origin: Wikidata (CC0), checked against state sources.
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