Demographics & People — Mason County, Illinois
Population & Households
| Population (official) | 13,074 |
|---|---|
| Median Age | 45.40 |
| Veterans | 854 |
| Housing Units | 6,646 |
| Uninsured | 70 |
Migration
| Inflow | 11,506 |
|---|---|
| Outflow | 11,815 |
| Net | -309 |
| Growing | No |
| 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 2026-04-13T15:43:27.700314+00:00; aggregated 2026-04-13T16:08:22.968195+00:00.