Demographics & People — Williamson County, Illinois
Population & Households
| Population (official) | 67,120 |
|---|---|
| Median Age | 41.20 |
| Veterans | 4,893 |
| Housing Units | 31,811 |
| Uninsured | 374 |
Migration
| Inflow | 60,323 |
|---|---|
| Outflow | 59,425 |
| Net | 898 |
| 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 2026-04-13T15:43:27.783433+00:00; aggregated 2026-04-13T16:08:23.036636+00:00.