San Anselmo town, California
Official LSAD Designation: San Anselmo town • Census GEOID: 0664434
• Marin County
San Anselmo town is an incorporated town in Marin County, California. According to official records from the Census (2025), San Anselmo town had an estimated population of 12,555 residents. Official Census Bureau geographic records classify this community under LSAD designation San Anselmo town (GEOID 0664434).
Local Government Administration U.S. Census Bureau GMAF
Town Of San Anselmo
Municipal
Official Title:
Town Manager
Address:
525 SAN ANSELMO AVE, SAN ANSELMO CA 94960-2682
County Of Marin
County
Official Title:
County Adminstrator
Address:
3501 CIVIC CENTER DR, RM 325, SAN RAFAEL CA 94903-4176
Civic & Statistical Snapshot
| Category | Estimate | Survey Period / Source |
|---|---|---|
| Total Population | 12,555 | 2025 |
| Median Household Income | $173,641 | 2020-2024 |
| Median Home Value | $1,576,700 | 2020-2024 |
| Land Area | 2.68 sq mi | Gazetteer (2026) |
| Civic & Public Services | Hospitals, Libraries, Colleges | CMS / IMLS / IPEDS |
| Schools & Districts | NCES Directory Listings | Provided by k12guides.com |
| Nearby Airports | Landing Facilities | Provided by airport-data.com |
| Climate & Weather | NOAA 30-Year Normals | 1991–2020 |
Source: U.S. Census Bureau (PEP, ACS 5-Year).