Migration to and from Sonoma County, California
Where Sonoma 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
24,038
people moved in (5-yr)
Total outflow
23,992
people moved out (5-yr)
Net migration
+46
inflow minus outflow
Top 10 counties people moved IN from
| Origin | State / Region | People (5-yr) |
|---|---|---|
| Marin County | California | 2,113 |
| San Francisco County | California | 1,587 |
| Solano County | California | 1,378 |
| Santa Clara County | California | 1,272 |
| Alameda County | California | 1,038 |
| San Mateo County | California | 845 |
| Sacramento County | California | 713 |
| Los Angeles County | California | 664 |
| Africa | 659 | |
| Contra Costa County | California | 617 |
Top 10 counties people moved OUT to
| Destination | State / Region | People (5-yr) |
|---|---|---|
| Marin County | California | 1,125 |
| Solano County | California | 1,119 |
| Lake County | California | 962 |
| Yolo County | California | 921 |
| Contra Costa County | California | 893 |
| Sacramento County | California | 806 |
| Stanislaus County | California | 669 |
| San Francisco County | California | 658 |
| Alameda County | California | 608 |
| San Diego County | California | 586 |
Explore Sonoma County
- Business data for Sonoma CountyConstruction sector establishments, employment, payroll
- Cities in CaliforniaACS demographic profiles for places statewide
- ZIP code lookupSearch demographic data by ZIP code
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- Federal contracts in CAGovBids: RFPs, awards, NAICS matching
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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: 06097.