San Juan County, Colorado
County seat: Silverton · Population 813 (2025) · 388 sq mi
San Juan County is the 63rd most populous of Colorado's 64 counties, with 813 people (2025 estimate). Its county seat is Silverton. It is part of the Region 9: Southern Western Slope region, one of the 14 Planning and Management Regions of Colorado. The map shows its 1 city or town and the 6 neighboring counties.
San Juan County facts
- County seat
- Silverton
- Population (2025 estimate)
- 813 +15.5% since 2020
- Land area
- 388 sq mi 60th largest of 64
- Water area
- 1 sq mi
- Population density
- 2 per sq mi
- Established
- 1876
- Same name
- One of 4 San Juan Counties in the US
- Named after
- John the Apostle apostle of Jesus; son of Zebedee and Salome, brother of James; traditionally identified with John the Evangelist, John of Patmos, and the Beloved Disciple
- Largest city
- Silverton 721
- Median household income
- $77,824
- Cities and towns
- 1
- ZIP codes
- 2
- Time zone
- Mountain
- FIPS code
- 08111
Cities and towns in San Juan County
San Juan County has 1 incorporated place. Populations count the people living inside San Juan County; cities that cross a county line also list the other counties.
| Name | Type | Population 2025 | Also in |
|---|---|---|---|
| Silverton (county seat) | Town | 721 |
ZIP codes in San Juan County
2 ZIP codes reach into San Juan County. ZIP codes ignore county lines, so some also cover a neighboring county.
- 81301 also La Plata County
- 81433
Population of San Juan County, 2020–2025
San Juan County grew by 109 people (+15.5%) between April 2020 and July 2025: 8 more deaths than births and a net gain of 113 people from migration.
| Year (July 1) | Population |
|---|---|
| 2020 | 710 |
| 2021 | 739 |
| 2022 | 801 |
| 2023 | 802 |
| 2024 | 821 |
| 2025 | 813 |
Neighboring counties
- Hinsdale County east · 753 people
- La Plata County south · 56,898 people
- Dolores County west · 2,466 people
- Ouray County north · 5,265 people
- San Miguel County west · 7,753 people
- Montezuma County southwest · 26,678 people
Printable San Juan 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) (64 KB)
- PNG (2400 px) (68 KB)
Paste this code to embed the map on your site:
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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