Migration to and from St. Louis County, Missouri
Where St. Louis 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
56,270
people moved in (5-yr)
Total outflow
51,722
people moved out (5-yr)
Net migration
+4,548
inflow minus outflow
Top 10 counties people moved IN from
| Origin | State / Region | People (5-yr) |
|---|---|---|
| St. Louis City | Missouri | 11,953 |
| St. Charles County | Missouri | 4,587 |
| Jefferson County | Missouri | 4,169 |
| Asia | 2,724 | |
| St. Clair County | Illinois | 1,477 |
| Boone County | Missouri | 873 |
| Europe | 839 | |
| Cook County | Illinois | 772 |
| Franklin County | Missouri | 770 |
| Madison County | Illinois | 763 |
Top 10 counties people moved OUT to
| Destination | State / Region | People (5-yr) |
|---|---|---|
| St. Louis City | Missouri | 8,837 |
| St. Charles County | Missouri | 6,178 |
| Jefferson County | Missouri | 4,505 |
| Boone County | Missouri | 1,415 |
| St. Clair County | Illinois | 1,033 |
| Franklin County | Missouri | 945 |
| Madison County | Illinois | 875 |
| Greene County | Missouri | 702 |
| Jackson County | Missouri | 700 |
| Cook County | Illinois | 678 |
Explore St. Louis County
- Business data for St. Louis CountyConstruction sector establishments, employment, payroll
- Cities in MissouriACS demographic profiles for places statewide
- ZIP code lookupSearch demographic data by ZIP code
- Opportunity IndexRank counties by business growth potential
- Federal contracts in MOGovBids: RFPs, awards, NAICS matching
- New business filings in MissouriNewFilings: fresh SOS registrations
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: 29189.