Demographics & People — Cook County, Illinois
Population & Households
| Population (official) | 5,225,367 |
|---|---|
| Median Age | 37.50 |
| Veterans | 142,022 |
| Housing Units | 2,261,319 |
| Uninsured | 45,655 |
Migration
| Inflow | 4,217,303 |
|---|---|
| Outflow | 4,344,414 |
| Net | -127,111 |
| 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 2026-04-13T15:43:27.608318+00:00; aggregated 2026-04-13T16:08:22.889164+00:00.