Demographics & People — Jefferson County, Missouri
Population & Households
| Population (official) | 226,984 |
|---|---|
| Median Age | 39.90 |
| Veterans | 14,322 |
| Housing Units | 92,590 |
| Uninsured | 2,109 |
Migration
| Inflow | 217,443 |
|---|---|
| Outflow | 213,417 |
| Net | 4,026 |
| 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 2026-04-13T15:43:28.885575+00:00; aggregated 2026-04-13T16:08:24.062739+00:00.