San Geronimo ZIP code, California
The ZIP code for San Geronimo, CA is 94963, and its area codes are 415 and 628.
- USPS city name
- 1 ZIP code
- Overlapping the city
- 1 more
- Population
- 583
- County
- Marin County
- State
- California
NANPA lists no telephone rate centre for San Geronimo itself, so these are the area codes of the nearest one, Nicasio (4.9 miles). A town on an area-code boundary can differ from its neighbour.
Mail addressed to San Geronimo uses the ZIP code above. 1 more ZIP code covers part of the city but is addressed as somewhere else; they are listed separately below.
San Geronimo in numbers
About 583 people live in San Geronimo, in 207 households. The median household income is $171,932 a year, 73% above the California median of $99,122 (US: $80,734). The median owner-occupied home is valued at $1,175,500 (60% above the California median). The median age is 46.5; 94.5% of adults 25 and over hold a bachelor's degree or higher (37.1% across California); the average commute takes 26 minutes.
| Population | 583 |
|---|---|
| Households | 207 |
| Median age | 46.5 |
| Median household income | $171,932 |
| Median home value | $1,175,500 |
| Bachelor's degree or higher | 94.5% |
| Mean commute | 26.4 min |
| Population density | 387 / sq mi |
U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates, for the census place San Geronimo CDP. Survey estimates carry margins of error, wider for small places. Sources and methods.
ZIP codes addressed as San Geronimo
| ZIP | City | Type | Population | Median income | Median home |
|---|---|---|---|---|---|
94963 | San Geronimo , CA | Standard | 739 | $210,823 | $1,156,300 |
Other ZIP codes overlapping San Geronimo
These ZIP codes cover part of San Geronimo but are addressed as somewhere else.
| ZIP | City | Type | Population | Median income | Median home |
|---|---|---|---|---|---|
94973 | Woodacre , CA | Standard | 1,689 | $231,094 | $1,076,300 |
Map of San Geronimo ZIP codes
The ZIP codes of San Geronimo, CA, shaded. Outlines are Census ZIP Code Tabulation Areas (2020), which approximate the mail routes; PO-box and single-address codes have no area and are not drawn. Click any area to open its ZIP code.
Towns near San Geronimo
The nearest larger towns are Woodacre (1,627 people, 1.4 mi), Lagunitas-Forest Knolls (1,626 people, 1.7 mi) and Fairfax (7,516 people, 3.9 mi).
| Town | Population | Distance |
|---|---|---|
| Fairfax | 7,516 | 3.9 mi |
| Sleepy Hollow | 3,063 | 4.1 mi |
| Lucas Valley-Marinwood | 6,473 | 5.3 mi |
| San Anselmo | 12,679 | 5.4 mi |
| Ross | 2,606 | 6.3 mi |
| Kentfield | 6,900 | 7.5 mi |
| Novato | 52,546 | 8.3 mi |
| Larkspur | 12,854 | 8.6 mi |
| San Rafael | 60,433 | 8.7 mi |
| Santa Venetia | 3,725 | 8.7 mi |
| Mill Valley | 14,012 | 9.5 mi |
| Corte Madera | 10,077 | 9.9 mi |
| Tamalpais-Homestead Valley | 12,085 | 11.2 mi |
| Strawberry | 5,830 | 11.6 mi |
More nearby: every ZIP code in Marin County · California ZIP codes
Cite this page
zipcodes.pro. “San Geronimo, CA ZIP codes.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/city/ca/san-geronimo
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