Demographics & People — Gallatin County, Montana
Population & Households
| Population (official) | 119,685 |
|---|---|
| Median Age | 33.50 |
| Veterans | 5,615 |
| Housing Units | 53,605 |
| Uninsured | 1,251 |
Migration
| Inflow | 119,107 |
|---|---|
| Outflow | 118,338 |
| Net | 769 |
| Growing | Yes |
| Year | 2022-2023 |
Source: Census ACS 5-Year 2022. Official numbers: Census ACS 5-Year 2022 — county-level query.
Data provenance: aggregated from town-level sources, county.json. Rebuilt 2026-04-13T15:43:28.996612+00:00; aggregated 2026-04-13T16:08:24.166356+00:00.