Demographics & People — Yellowstone County, Montana
Population & Households
| Population (official) | 165,524 |
|---|---|
| Median Age | 38.40 |
| Veterans | 12,032 |
| Housing Units | 72,252 |
| Uninsured | 1,625 |
Migration
| Inflow | 158,499 |
|---|---|
| Outflow | 157,115 |
| Net | 1,384 |
| 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 2026-04-13T15:43:29.047122+00:00; aggregated 2026-04-13T16:08:24.210345+00:00.