Demographics & People — Mercer County, Illinois
Population & Households
| Population (official) | 15,692 |
|---|---|
| Median Age | 44.70 |
| Veterans | 1,068 |
| Housing Units | 7,311 |
| Uninsured | 136 |
Migration
| Inflow | 15,145 |
|---|---|
| Outflow | 15,177 |
| Net | -32 |
| 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 2026-04-13T15:43:27.715543+00:00; aggregated 2026-04-13T16:08:22.980942+00:00.