Marin County, California
Marin County, California, has 253,694 residents (July 2025 estimate). Its county seat is San Rafael. It uses Pacific Time and covers 520 sq mi (1,347 km²) of land.
- Resident population, July 2025
- 253,694
- Land area
- 520 sq mi (1,347 km²)
- County seat or government
- San Rafael
- Time zone
- Pacific TimeUTC-08:00 in January; UTC-07:00 in July
- Median household income
- $149,091 ± $4,474
- Median home value
- $1,507,300 ± $27,346
- Median rent, with utilities
- $2,668 ± $83
- Homes lived in by their owners
- 64.7% ± 1.0 points
- County type
- County
- Metro or micro area
- San Francisco-Oakland-Fremont, CA metro areaCentral county
- Water area
- 308 sq mi (798 km²)
- State
- California
- County code (FIPS)
- 06041
- Coordinates (central point)
- 38.051367, -122.746396
These coordinates mark a central point for the area, not a street address. Income, home value, rent and homes lived in by their owners: U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates, ± margin at 90% confidence; checked on October 13, 2026.
Time zones in Marin County
| Time zone | Local time and UTC offset | Next clock change |
|---|---|---|
| Pacific TimeAmerica/Los_Angeles | UTC-08:00 in January; UTC-07:00 in July. Enable JavaScript for the live clock. | Enable JavaScript for upcoming changes. |
Near a time-zone line, check where you are with the time-zone finder. Your phone’s setting can differ.
ZIP Code areas, largest first
- 9490141,307 people
- 9495233,785 people
- 9494132,706 people
- 9490330,615 people
- 9494724,100 people
- 9494917,787 people
- 9494517,635 people
- 9496016,232 people
- 9490412,815 people
- 9492012,609 people
- 9496511,724 people
- 9492510,077 people
All 29
29 ZIP Code areas overlap Marin County. People counts are 2020–2024 estimates for each whole ZIP area. Mailing ZIPs can differ; check an address with USPS ZIP Code Lookup.
Official county information
Marin County government website ↗ is the next stop for county offices, tax, voting, jury and records information. A geographic lookup cannot determine eligibility, tax liability or a court obligation.
School districts in Marin County, largest first
- Tamalpais Union High School District119,502 people
- San Rafael City High School District75,209 people
- Petaluma Joint Union High School District73,567 people
- Novato Unified School District59,463 people
- San Rafael City Elementary School District52,158 people
- Mill Valley Elementary School District33,100 people
- Ross Valley Elementary School District24,353 people
- Dixie Elementary School District23,051 people
- Larkspur Elementary School District14,661 people
- Reed Union Elementary School District14,085 people
- Kentfield Elementary School District12,431 people
- Sausalito Elementary School District11,525 people
All 18
- Shoreline Unified School District5,354 people
- Lagunitas Elementary School District3,898 people
- Ross Elementary School District3,107 people
- Bolinas-Stinson Union Elementary School District1,627 people
- Nicasio Elementary School District715 people
- Laguna Joint Elementary School District540 people
Districts with land in the county; a district can cross county lines. People counts are American Community Survey 2020–2024 5-year estimates. A district boundary doesn’t decide which school a student attends.
Cities, towns and communities, largest first
These areas overlap the mapped boundary; an overlap does not mean that every address belongs to both.
- San Rafael, California (city)60,433 people
- Novato, California (city)52,546 people
- Mill Valley, California (city)14,012 people
- Larkspur, California (city)12,854 people
- San Anselmo, California (town)12,679 people
- Tamalpais-Homestead Valley, California (CDP)12,085 people
- Corte Madera, California (town)10,077 people
- Tiburon, California (town)9,012 people
- Fairfax, California (town)7,516 people
- Sausalito, California (city)7,141 people
- Kentfield, California (CDP)6,900 people
- Lucas Valley-Marinwood, California (CDP)6,473 people
All 31
- Strawberry, Marin County, California (CDP)5,830 people
- Santa Venetia, California (CDP)3,725 people
- Marin City, California (CDP)3,195 people
- Sleepy Hollow, California (CDP)3,063 people
- Ross, California (town)2,606 people
- Belvedere, California (city)2,345 people
- Black Point-Green Point, California (CDP)1,655 people
- Woodacre, California (CDP)1,627 people
- Lagunitas-Forest Knolls, California (CDP)1,626 people
- Inverness, California (CDP)1,346 people
- Bolinas, California (CDP)1,334 people
- Alto, California (CDP)1,024 people
- San Geronimo, California (CDP)583 people
- Point Reyes Station, California (CDP)517 people
- Muir Beach, California (CDP)311 people
- Dillon Beach, California (CDP)293 people
- Stinson Beach, California (CDP)255 people
- Tomales, California (CDP)168 people
See all 31 cities, towns and communities in Marin County, largest first
Bordering areas, nearest first
Distances are straight lines between map points.
- San Francisco County, California27 mi southwest
- Sonoma County, California34 mi north
- Contra Costa County, California44 mi east
- Solano County, California46 mi east
Before using this answer on a form
Use a precise point for address-level questions. A device accuracy circle can cross a boundary; confirm tax, voting or jury details with the responsible office.
Find the county where you are now, check its ZIP area, or check the time zone where you are.
Areas that only touch the edge
These areas meet the boundary only along a sliver. Most addresses here are not in them; for an address near the line, check with the county.