Demographics & People — Johnson County, Illinois
Population & Households
| Population (official) | 13,313 |
|---|---|
| Median Age | 42.30 |
| Veterans | 864 |
| Housing Units | 5,536 |
| Uninsured | 126 |
Migration
| Inflow | 10,058 |
|---|---|
| Outflow | 10,082 |
| Net | -24 |
| 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 2026-04-13T15:43:27.655400+00:00; aggregated 2026-04-13T16:08:22.928855+00:00.