Demographics & People — Madison County, Illinois

Population & Households

Population (official)265,512
Median Age39.90
Veterans17,514
Housing Units118,715
Uninsured1,571

Migration

Inflow237,226
Outflow236,270
Net956
GrowingYes
Year2022-2023

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 2026-04-13T15:43:27.695690+00:00; aggregated 2026-04-13T16:08:22.963995+00:00.