Rancho San Geronimo (Cacho) - Revere Contract, 1855
San Geronimo’s story
131 years in pictures
The archive holds 3 old photos and papers going back to 1855.
- 1895San Geronimo is settled
San GeronimoCA
A town of 583, settled in 1895.
Population
583
Census survey, 2020–24
Typical home
$1.14M
+2.4% in a year
Household income
$172K
median
Median age
46.5
years
Jobs based here
111
A commuter town
Is San Geronimo a good place to live?
94% of adults 25 and older hold a bachelor’s degree or more in San Geronimo, above both California’s towns (29%) and U.S. towns (29%). 66% of the land in San Geronimo is conserved, against 4.3% in California’s towns and 4.3% across U.S. towns. The biggest place to walk is Gary Giacomini Open Space Preserve, 578 acres with 5.5 miles of trail. San Geronimo has fewer than 1,000 residents, too few for fair grades; the figures below are still real.
Small town
583 people, and everyone knows the way
In a town this size, neighbors are the best guide. Ask them anything.
Nearby towns
WoodacreLagunitas-Forest KnollsSan Geronimo
Nearby attractions
All 219 attractions →Alcatraz Federal Penitentiary and 179 more within 40 miles
Museums, parks, gardens and other places to visit around San Geronimo. Close and well known come first.
Big draw18 mi MuseumAlcatraz Federal Penitentiary
8 mi National MonumentMuir Woods National Monument757K visitors a year
Big draw18 mi GardenPresidio of San Francisco
Big draw19 mi LandmarkLombard Street
Big draw22 mi Stadium & arenaChase Center
Big draw22 mi Stadium & arenaOracle ParkSources: National Park Service · ski areas © OpenSkiMap / OpenStreetMap contributors · Wikidata · Wikipedia readership · photos via Wikimedia Commons
Photo credits
Alcatraz Federal Penitentiary: druchoy, CC BY-SA 2.0 · Muir Woods National Monument: Unknown, CC BY-SA 3.0 · Presidio of San Francisco: Robert Campbell, CC BY-SA 3.0 · Lombard Street: The original uploader was Y6y6y6 at English Wikipedia., Public domain · Chase Center: Gregory Varnum, CC BY-SA 4.0 · Oracle Park: User Coasttocoast on en.wikipedia, CC BY-SA 3.0
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Getting set up
Moving to San Geronimo: who provides what
San Geronimo is unincorporated, so Marin County and regional agencies provide most services.
PowerPG&E37.5¢/kWh · EIA 2025HIFLD · EIA
WaterMarin Municipal Water DistrictNo health-based violations in 5 years · EPAEPA
Internet3 providers98% of addresses get 100/20 MbpsFCC
Trash & county servicesMarin CountyMarin County provides services here
SchoolsLagunitas Elementary School DistrictTamalpais Union High School District2 districts serve San Geronimo; which school depends on your address and gradeNCES
Register to voteOnlineIn California you can register online until 15 days before Election Day, in person up to and including Election Day, or by mail (postmarked 15 days before).vote.govWho runs elections hereMarin County Registrar of VotersMarin County; contacts on the Handbook page.FVAP, Jul 2025
ZIP codes94963, 9497394963 90% · 94973 10%Census 2020
EPA SDWIS (Oct 9, 2026) · HIFLD + EIA-861 2025 · Census 2020 ZCTAs · NCES 2024–25 · registration: vote.gov, updated Nov 18, 2024.
The data
Ordered by what stands out in San Geronimo.
Outdoors
San Geronimo has set aside nearly a third of its land for conservation
6.6 miles of trail in 4 parks and preserves. The trail density in San Geronimo is 4.4 miles per square mile.
66.3%conserved
66.3%
conserved · 637 of 960 acres
6.6 mi
of trails · 4.4 per sq mi
| Biggest places to walk | Trails | Acres |
|---|---|---|
| 1. Gary Giacomini Open Space Preserve | 5.5 mi | 578 |
| 2. San Geronimo Meadow | 0.3 mi | 8 |
| 3. San Geronimo Park | — | 8 |
Trails & parks © OpenStreetMap contributors · Conserved land: USGS PAD-US
Natural hazards
Inland flooding leads a very high hazard risk in San Geronimo
Expected storm and flood damage is higher than in 99% of U.S. communities. Since 1982, 34 flood insurance claims have been paid out in San Geronimo.
99risk score of 100
FEMA risk score
Inland floodingEarthquakesWildfire
34
paid flood claims since 1982
1
federal disasters paid out here
FEMA flood insurance claims · FEMA National Risk Index · OpenFEMA
Housing
A typical San Geronimo home is worth about $1.14M
The typical San Geronimo home is worth about $1,142,000, up 2.4% in a year, 50% above the California typical home. 90% of households own their home in San Geronimo.
$1.14MZillow home value
Typical home value
San Geronimo$1.14M
California$762K
+2.4%
value change, 1 year
1
homes sold in April
Census ACS, 2020–24 · Zillow Home Value Index · Redfin Data Center
Work & commute
San Geronimo has 0.7 jobs for every working resident, so most commute out
Most working residents leave San Geronimo for work: only 2% work in town. Jobs based in San Geronimo fell to 111 in 2023, 33 fewer than in 2013. The top destinations are San Francisco (16%), San Rafael (11%) and San Anselmo (4%).
2%work in town
| San Geronimo | California towns | U.S. towns | |
|---|---|---|---|
| Working residents who work in town | 1.9% | 6.6% | 8% |
| Average trip to work | 26 minutes | 28 minutes | 25 minutes |
Where working residents work
In San Geronimo2%
San Francisco16%
San Rafael11%
San Anselmo4%
San Jose4%
21 mi
median commute distance
111
jobs based in San Geronimo
A commuter town
jobs vs. working residents
Census LEHD 2023 · ACS
Climate
Mild winters and pleasant summers in San Geronimo
San Geronimo has warm winters and pleasant summers. San Geronimo’s July high is 76°F.
77°summer high
Typical low → high °F
Winter42–57°
Spring45–64°
Summer52–75°
Fall50–71°
+1.5°
vs. the 20th-century average
77°
typical summer high
NOAA U.S. Climate Normals, 1991–2020
Health
Compared with most of California and the rest of the country, fewer of San Geronimo’s adults feel lonely
27% of San Geronimo adults feel lonely. San Geronimo beats the California average on 17 of 32 CDC measures and trails it on 5. 13% of San Geronimo adults report frequent mental distress.
| San Geronimo | California towns | U.S. towns | |
|---|---|---|---|
| Feel lonely (CDC PLACES) | 27% | 36% | 33% |
| Obesity (CDC PLACES) | 22% | 29% | 35% |
| Frequent mental distress (CDC PLACES) | 13% | 17% | 17% |
| Get no exercise (CDC PLACES) | 17% | 24% | 25% |
32 measures vs. California
17 better10 too close to call5 worse
| What stands out | San Geronimo | CA |
|---|---|---|
| Fewer uninsured adults | 3.8% | 10.6% |
| Fewer adults facing food insecurity | 6.7% | 17.9% |
| More adults who have had cancer | 12.8% | 6.4% |
Kaiser Foundation Hospital
6 mi away · emergency room
None
primary care, dental or mental-health shortage
CDC PLACES 2025 · modeled estimates for adults · CMS · HRSA
Keep exploring
Everything we know about San Geronimo
17pages on San Geronimo
The big questions
Out and about
After high school
Colleges nearby
3 within 15 miles of the center of San Geronimo
Presidio Graduate SchoolUniversity or college · Private nonprofit · San Anselmo5.9 miCollege of MarinCommunity college · Public · Kentfield7.3 mi$1,558 in-state tuitionDominican University of CaliforniaUniversity or college · Private nonprofit · San Rafael8.4 mi$52,161 tuition
College town 17 of every 100 San Geronimo residents are enrolled in college, against 8 across California.
Get outside
7 miles of trails in San Geronimo
66.3% of the town is conserved land, across 4 parks and preserves.
1
Gary Giacomini Open Space Preserve5.5 mi of trails · 578 acres
2
San Geronimo Meadow0.3 mi of trails · 8 acres
3
San Geronimo Park8 acres
Trails © OpenStreetMap contributors · USGS PAD-US
About San Geronimo
Place in California, United States
San Geronimo (Spanish: San Gerónimo, meaning "St. Jerome") is a census-designated place (CDP) located in the San Geronimo Valley in Marin County, California, United States. San Geronimo is bordered by Lagunitas-Forest Knolls to its west and Woodacre to its east. It is 8 miles (13 km) southwest of downtown Novato at an elevation of 292 feet (89 m). The population was 510 at the 2020 census.
From Wikipedia, licensed CC BY-SA 4.0 · facts via Wikidata (CC0)
- Area
- 1.5 sq mi
- Elevation
- 292 ft
- ZIP code
- 94963
Questions about San Geronimo
Short answers, built from the data on this page.
Is San Geronimo, CA a good place to live?
San Geronimo has fewer than 1,000 residents, too few for fair grades; the figures below are still real.