Migration to and from St. Mary's County, Maryland
Where St. Mary's 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
8,795
people moved in (5-yr)
Total outflow
6,575
people moved out (5-yr)
Net migration
+2,220
inflow minus outflow
Top 10 counties people moved IN from
| Origin | State / Region | People (5-yr) |
|---|---|---|
| Calvert County | Maryland | 1,142 |
| Charles County | Maryland | 947 |
| Prince George's County | Maryland | 570 |
| Anne Arundel County | Maryland | 292 |
| Baltimore City | Maryland | 255 |
| Asia | 250 | |
| Montgomery County | Maryland | 240 |
| Queen Anne's County | Maryland | 240 |
| Worcester County | Massachusetts | 174 |
| Pearl River County | Mississippi | 152 |
Top 10 counties people moved OUT to
| Destination | State / Region | People (5-yr) |
|---|---|---|
| Calvert County | Maryland | 496 |
| Charles County | Maryland | 418 |
| Norfolk City | Virginia | 340 |
| San Diego County | California | 305 |
| Fairfax County | Virginia | 228 |
| King George County | Virginia | 228 |
| Baltimore County | Maryland | 192 |
| Cumberland County | North Carolina | 181 |
| Prince George's County | Maryland | 170 |
| Wayne County | North Carolina | 140 |
Explore St. Mary's County
- Business data for St. Mary's CountyConstruction sector establishments, employment, payroll
- Cities in MarylandACS demographic profiles for places statewide
- ZIP code lookupSearch demographic data by ZIP code
- Opportunity IndexRank counties by business growth potential
- Federal contracts in MDGovBids: RFPs, awards, NAICS matching
- New business filings in MarylandNewFilings: 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: 24037.