San Francisco County, California
County seat: San Francisco · Population 826,079 (2025) · 47 sq mi
San Francisco County is the 13th most populous of California's 58 counties, with 826,079 people (2025 estimate). Its county seat is San Francisco. The map shows its 1 city or town and the 4 neighboring counties.
San Francisco County facts
- County seat
- San Francisco
- Population (2025 estimate)
- 826,079 −6% since 2020
- Land area
- 47 sq mi 58th largest of 58
- Water area
- 185 sq mi
- Population density
- 17,695 per sq mi
- Established
- 1850
- Named after
- San Francisco city and county in California, US
- Largest city
- San Francisco 826,079
- Median household income
- $140,970
- Cities and towns
- 1
- ZIP codes
- 30
- Time zone
- Pacific
- FIPS code
- 06075
Cities and towns in San Francisco County
San Francisco County has 1 incorporated place. Populations count the people living inside San Francisco County; cities that cross a county line also list the other counties.
| Name | Type | Population 2025 | Also in |
|---|---|---|---|
| San Francisco (county seat) | City | 826,079 |
ZIP codes in San Francisco County
30 ZIP codes reach into San Francisco County. ZIP codes ignore county lines, so some also cover a neighboring county.
- 94102
- 94103
- 94104
- 94105
- 94107
- 94108
- 94109
- 94110
- 94111
- 94112
- 94114
- 94115
- 94116
- 94117
- 94118
- 94121
- 94122
- 94123
- 94124
- 94127
- 94129
- 94130
- 94131
- 94132
- 94133
- 94134
- 94158
- 94188
- 94501 also Alameda County
- 94920 also Marin County
Population of San Francisco County, 2020–2025
San Francisco County shrank by 52,471 people (−6%) between April 2020 and July 2025: 3,776 more births than deaths and a net loss of 50,262 people from migration.
| Year (July 1) | Population |
|---|---|
| 2020 | 875,139 |
| 2021 | 816,169 |
| 2022 | 813,266 |
| 2023 | 816,926 |
| 2024 | 820,945 |
| 2025 | 826,079 |
Neighboring counties
- Marin County northwest · 253,694 people
- San Mateo County south · 743,568 people
- Alameda County east · 1,636,630 people
- Contra Costa County northeast · 1,170,070 people
Printable San Francisco 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) (62 KB)
- PNG (2400 px) (60 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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