Marin County, California demographics
Marin County, California (county FIPS 06041) has a median household income of $149,091 (±$4,474) and a total population of 257,969 in the American Community Survey 5-year estimates for 2020-2024.
Margins of error are at the 90% confidence level. The figures describe 2020-2024 (dollars in 2024 dollars), not the present. 29 ZIP Code Tabulation Areas overlap the county (Census 2020).
Data as of Oct 22, 2026 (Olympus publication) · Markdown version
- Values are ACS 5-year estimates for 2020-2024 (dollars in 2024 dollars), not current figures.
- ZCTA-county overlaps come from the Census 2020 relationship file and use 2020 counties, by land area; Connecticut uses its legacy counties, not the planning regions in ACS 2022+.
ACS 5-year estimates, 2020-2024
Census American Community Survey 5-year estimates for 2020-2024, with 90% margins of error as published by the Census Bureau.
| Metric | Estimate | Margin of error (90%) | ACS table |
|---|---|---|---|
| Total population | 257,969 | none (controlled estimate) | B01003 |
| Median age | 47.4 years | ±0.3 years | B01002 |
| Households | 103,018 | ±725 | B11001 |
| Median household income (inflation-adjusted to the final ACS year) | $149,091 | ±$4,474 | B19013 |
| Median value of owner-occupied housing units | $1,507,300 | ±$27,346 | B25077 |
| Median gross rent | $2,668 | ±$83 | B25064 |
| Owner-occupied share of occupied housing units | 64.7% | none (derived from several estimates) | B25003 (derived) |
| Renter-occupied share of occupied housing units | 35.3% | none (derived from several estimates) | B25003 (derived) |
| High school graduate or higher (age 25+) | 92.8% | none (derived from several estimates) | B15003 (derived) |
| Bachelor's degree or higher (age 25+) | 61.1% | none (derived from several estimates) | B15003 (derived) |
| Share of people below the poverty level | 8.3% | none (derived from several estimates) | B17001 (derived) |
| Unemployment rate (civilian labor force) | 6.1% | none (derived from several estimates) | B23025 (derived) |
- Dollar values are in 2024 inflation-adjusted dollars.
- Percentages' margins of error are in percentage points (pp).
Geography
| Measure | Value |
|---|---|
| County FIPS | 06041 |
| Land area | 520.14 sq mi |
| Water area | 308.04 sq mi |
| Population density | 496 per sq mi of land |
| Geography vintage | 2024 Gazetteer |
ZIP codes (ZCTAs) in this county
ZCTAs that overlap the county in the Census 2020 ZCTA to county relationship file, largest share of the county's land first.
| ZCTA | Share of county land | Share of ZCTA land | County is the ZCTA's primary county |
|---|---|---|---|
| 94952 | 19.6% | 51.5% | Yes |
| 94937 | 10.8% | 100% | Yes |
| 94941 | 7.2% | 100% | Yes |
| 94946 | 7.2% | 100% | Yes |
| 94956 | 6.7% | 100% | Yes |
| 94924 | 5.3% | 100% | Yes |
| 94940 | 5% | 100% | Yes |
| 94945 | 4.5% | 100% | Yes |
| 94971 | 4.3% | 100% | Yes |
| 94947 | 4.2% | 100% | Yes |
| 94903 | 3.8% | 100% | Yes |
| 94965 | 2.8% | 100% | Yes |
| 94930 | 2.7% | 100% | Yes |
| 94949 | 2.6% | 100% | Yes |
| 94901 | 2.5% | 100% | Yes |
| 94938 | 1.8% | 100% | Yes |
| 94970 | 1.4% | 100% | Yes |
| 94920 | 1.2% | 99.9% | Yes |
| 94960 | 1.1% | 100% | Yes |
| 94904 | 1% | 100% | Yes |
| 94950 | 0.9% | 100% | Yes |
| 94973 | 0.8% | 100% | Yes |
| 94925 | 0.6% | 100% | Yes |
| 94933 | 0.6% | 100% | Yes |
| 94939 | 0.5% | 100% | Yes |
| 94963 | 0.3% | 100% | Yes |
| 94957 | 0.3% | 100% | Yes |
| 94929 | 0.2% | 100% | Yes |
| 94964 | 0.1% | 100% | Yes |
Sources
- American Community Survey 5-year estimates (Census Data API) — U.S. Census Bureau. ACS 5-year 2020-2024 (release acs5-2024:county), source date 2025-09-02. https://api.census.gov/data/2024/acs/acs5?get=NAME,B01003_001E,B01003_001M,B01002_001E,B01002_001M,B11001_001E,B11001_001M,B19013_001E,B19013_001M,B25077_001E,B25077_001M,B25064_001E,B25064_001M,B25003_001E,B25003_002E,B25003_003E,B15003_001E,B15003_017E,B15003_018E,B15003_019E,B15003_020E,B15003_021E,B15003_022E,B15003_023E,B15003_024E,B15003_025E,B17001_001E,B17001_002E,B23025_003E,B23025_005E&for=county:041&in=state:06
- Published by Olympus on Oct 22, 2026.
- Source data: U.S. Census Bureau. Works of the U.S. government are not subject to copyright in the United States.
- This product uses the Census Bureau Data API but is not endorsed or certified by the Census Bureau.
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curl -s "https://api.olympus.new-odyssey.com/v1/geo-demographics/counties/06041" -H "X-API-Key: $OLYMPUS_API_KEY"get_us_demographics {"county_fips":"06041"}