Migration to and from Gallatin County, Montana
Where Gallatin 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
12,974
people moved in (5-yr)
Total outflow
8,544
people moved out (5-yr)
Net migration
+4,430
inflow minus outflow
Top 10 counties people moved IN from
| Origin | State / Region | People (5-yr) |
|---|---|---|
| Morrill County | Nebraska | 623 |
| Yellowstone County | Montana | 386 |
| King County | Washington | 339 |
| Missoula County | Montana | 298 |
| Flathead County | Montana | 297 |
| Arapahoe County | Colorado | 276 |
| Boulder County | Colorado | 239 |
| Cascade County | Montana | 231 |
| Madison County | Montana | 224 |
| Douglas County | Minnesota | 212 |
Top 10 counties people moved OUT to
| Destination | State / Region | People (5-yr) |
|---|---|---|
| Missoula County | Montana | 341 |
| Lewis and Clark County | Montana | 315 |
| Flathead County | Montana | 300 |
| Silver Bow County | Montana | 286 |
| Lake County | Montana | 284 |
| Yellowstone County | Montana | 278 |
| Salt Lake County | Utah | 250 |
| Jackson County | Oregon | 188 |
| Sanders County | Montana | 165 |
| Jefferson County | Montana | 164 |
Explore Gallatin County
- Business data for Gallatin CountyConstruction sector establishments, employment, payroll
- Cities in MontanaACS demographic profiles for places statewide
- ZIP code lookupSearch demographic data by ZIP code
- Opportunity IndexRank counties by business growth potential
- Federal contracts in MTGovBids: RFPs, awards, NAICS matching
- New business filings in MontanaNewFilings: 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: 30031.