Demographics & People — Lake County, Illinois
Population & Households
| Population (official) | 713,159 |
|---|---|
| Median Age | 38.70 |
| Veterans | 29,346 |
| Housing Units | 269,416 |
| Uninsured | 6,128 |
Migration
| Inflow | 673,084 |
|---|---|
| Outflow | 683,713 |
| Net | -10,629 |
| 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 2026-04-13T15:43:27.674148+00:00; aggregated 2026-04-13T16:08:22.944874+00:00.