Pitkin County, Colorado
County seat: Aspen · Population 16,625 (2025) · 971 sq mi
Pitkin County is the 31st most populous of Colorado's 64 counties, with 16,625 people (2025 estimate). Its county seat is Aspen. It is part of the Region 12: Northern Mountains region, one of the 14 Planning and Management Regions of Colorado. The map shows its 3 cities and towns and the 6 neighboring counties.
Pitkin County facts
- County seat
- Aspen
- Population (2025 estimate)
- 16,625 −4.2% since 2020
- Land area
- 971 sq mi 44th largest of 64
- Water area
- 3 sq mi
- Population density
- 17 per sq mi
- Established
- 1881
- Named after
- Frederick Walker Pitkin governor of Colorado, United States from 1879 to 1883
- Largest city
- Aspen 6,489
- Median household income
- $102,645
- Cities and towns
- 3 plus 3 CDPs
- ZIP codes
- 8
- Time zone
- Mountain
- FIPS code
- 08097
Cities and towns in Pitkin County
Pitkin County has 3 incorporated cities, towns and villages. Populations count the people living inside Pitkin County; cities that cross a county line also list the other counties.
| Name | Type | Population 2025 | Also in |
|---|---|---|---|
| Aspen (county seat) | City | 6,489 | |
| Snowmass Village | Town | 2,965 | |
| Basalt | Town | 1,084 | Eagle County |
Unincorporated communities (CDPs)
Census-designated places are communities without their own city government; the county provides their services.
| Community | Population | Also in |
|---|---|---|
| Redstone | 144 | |
| Woody Creek | 109 | |
| Norrie | 0 |
ZIP codes in Pitkin County
8 ZIP codes reach into Pitkin County. ZIP codes ignore county lines, so some also cover a neighboring county.
- 81611
- 81612
- 81615
- 81621 also Eagle County
- 81623 also Gunnison, Garfield and Eagle counties
- 81642
- 81654
- 81656
Population of Pitkin County, 2020–2025
Pitkin County shrank by 737 people (−4.2%) between April 2020 and July 2025: 290 more births than deaths and a net loss of 1,091 people from migration.
| Year (July 1) | Population |
|---|---|
| 2020 | 17,363 |
| 2021 | 17,360 |
| 2022 | 16,896 |
| 2023 | 16,761 |
| 2024 | 16,766 |
| 2025 | 16,625 |
Neighboring counties
- Gunnison County south · 17,439 people
- Eagle County northeast · 54,291 people
- Lake County east · 7,552 people
- Garfield County northwest · 63,474 people
- Mesa County west · 162,845 people
- Chaffee County southeast · 20,831 people
Printable Pitkin 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) (86 KB)
- PNG (2400 px) (70 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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