ZIP code 94920 demographics
ZCTA 94920 is the Census Bureau's ZIP Code Tabulation Area for ZIP code 94920, mostly in Marin County, CA. In the American Community Survey 5-year estimates for 2020-2024, its median household income is $246,045 (±$25,397) and its total population is 12,609 (±574).
Margins of error are at the 90% confidence level. The figures describe 2020-2024 (dollars in 2024 dollars), not the present. A ZCTA approximates, but is not the same as, the area a USPS ZIP code delivers to.
Data as of Oct 22, 2026 (Olympus publication) · Markdown version
- ZCTAs are Census statistical areas that approximate USPS ZIP code delivery areas; the code was matched to the ZCTA with the same code, which may not cover the same addresses as the ZIP code.
- 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 | 12,609 | ±574 | B01003 |
| Median age | 51.4 years | ±1.3 years | B01002 |
| Households | 4,934 | ±315 | B11001 |
| Median household income (inflation-adjusted to the final ACS year) | $246,045 | ±$25,397 | B19013 |
| Median value of owner-occupied housing units | $2,000,000 or more | not published (open-ended median) | B25077 |
| Median gross rent | $3,500 or more | not published (open-ended median) | B25064 |
| Owner-occupied share of occupied housing units | 72.3% | none (derived from several estimates) | B25003 (derived) |
| Renter-occupied share of occupied housing units | 27.8% | none (derived from several estimates) | B25003 (derived) |
| High school graduate or higher (age 25+) | 98.9% | none (derived from several estimates) | B15003 (derived) |
| Bachelor's degree or higher (age 25+) | 81.8% | none (derived from several estimates) | B15003 (derived) |
| Share of people below the poverty level | 2.6% | none (derived from several estimates) | B17001 (derived) |
| Unemployment rate (civilian labor force) | 8.2% | 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 |
|---|---|
| Land area | 6.51 sq mi |
| Water area | 5.69 sq mi |
| Population density | 1,937 per sq mi of land |
| Internal point | 37.886768, -122.462619 |
| Geography vintage | 2024 Gazetteer / 2020 relationship |
Counties this ZCTA overlaps
From the Census 2020 ZCTA to county relationship file, by share of the ZCTA's land area.
| County | Share of ZCTA land | Primary |
|---|---|---|
| Marin County, CA | 99.9% | Yes |
| San Francisco County, CA | 0.1% |
Sources
- American Community Survey 5-year estimates (Census Data API) — U.S. Census Bureau. ACS 5-year 2020-2024 (release acs5-2024:zcta), 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=zip%20code%20tabulation%20area:94920
- 2020 ZCTA to County Relationship File — U.S. Census Bureau. Census 2020, source date 2021-12-09. https://www2.census.gov/geo/docs/maps-data/data/rel2020/zcta520/tab20_zcta520_county20_natl.txt
- 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.
Get this data from the API
The same figures, with provenance on every value, from the API (free API key, reference) or from an AI agent through the Olympus MCP server.
curl -s "https://api.olympus.new-odyssey.com/v1/geo-demographics/locations/94920/demographics" -H "X-API-Key: $OLYMPUS_API_KEY"
curl -s "https://api.olympus.new-odyssey.com/v1/geo-demographics/locations/94920" -H "X-API-Key: $OLYMPUS_API_KEY"get_us_demographics {"zcta":"94920"}Related pages
- Marin County, CA — primary county
- California: every county and ZCTA