Migration to and from Marin County, California
Where Marin County residents came from and where they went over the 5-year window 2016-2020. Census ACS County-to-County Migration Flows, 2020 5-yr (frozen vintage).
Total inflow
20,184
people moved in (5-yr)
Total outflow
18,171
people moved out (5-yr)
Net migration
+2,013
inflow minus outflow
Top 10 counties people moved IN from
| Origin | State / Region | People (5-yr) |
|---|---|---|
| San Francisco County | California | 3,285 |
| Los Angeles County | California | 1,472 |
| Sonoma County | California | 1,125 |
| Santa Clara County | California | 881 |
| Alameda County | California | 809 |
| Europe | 762 | |
| San Mateo County | California | 630 |
| Orange County | California | 555 |
| Asia | 522 | |
| Madera County | California | 505 |
Top 10 counties people moved OUT to
| Destination | State / Region | People (5-yr) |
|---|---|---|
| Sonoma County | California | 2,113 |
| San Francisco County | California | 1,282 |
| Alameda County | California | 880 |
| Los Angeles County | California | 833 |
| Solano County | California | 699 |
| Lassen County | California | 596 |
| Contra Costa County | California | 476 |
| Santa Clara County | California | 382 |
| Middlesex County | New Jersey | 381 |
| Sacramento County | California | 356 |
Explore Marin County
- Business data for Marin CountyConstruction sector establishments, employment, payroll
- Cities in CaliforniaACS demographic profiles for places statewide
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Methodology
- Counts represent the number of people aged 1+ who reported a different residence at the survey reference date than they did one year earlier, aggregated across the 5-year sample window 2016-2020.
- Outbound (OUT) flows are reported less frequently than inbound (IN) because the survey captures the destination side of each move. Many county pairs have null OUT counts, which is normal.
- "Total inflow" sums the published MOVEDIN counts across all origin counties, including foreign-region inflows (Africa, Asia, Central America, etc.). It is not the same as net population change.
- Frozen vintage. The Census Bureau has not released a newer county-to-county migration flows file. The 2020 5-yr vintage (covering 2016-2020) is the latest available as of build date.
Source: U.S. Census Bureau, American Community Survey, County-to-County Migration Flows: 2016-2020. Vintage: 2020 5-yr. Generated: 2026-05-28. FIPS: 06041.