Market insights · Illinois
Clay County, IL: growth, migration and housing
Clay County has 12,793 residents, down 3.6% since 2020 (-0.4% in the last year). In 2022–2023, 251 households moved in and 274 moved out (-23 net), while a net $0.4M of income left. Median household income is $60,417, the median home $97,400 and median rent $735 a month.
In Illinois: 80th of 102 counties for 5-year population growth · 56th of 102 counties for net in-migration (per resident) · 83rd of 102 counties for median household income · 92nd of 102 counties for median home value.
Where new residents came from
Top counties by households (tax returns) moving to Clay County, 2022–2023 (IRS).
| From | Households (tax returns) | Their income (AGI) |
|---|---|---|
| Wayne County, IL | 29 | $1.2M |
| Effingham County, IL | 26 | $1.3M |
| Marion County, IL | 26 | $0.7M |
| Richland County, IL | 20 | $0.8M |
Where leavers went
Top counties by households leaving Clay County, 2022–2023 (IRS).
| To | Households (tax returns) | Their income (AGI) |
|---|---|---|
| Wayne County, IL | 46 | $2.1M |
| Effingham County, IL | 37 | $1.4M |
| Marion County, IL | 23 | $0.9M |
BizyFi in Clay County
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Sources: U.S. Census Bureau population estimates (vintage 2025), American Community Survey 5-year (2024), and IRS Statistics of Income county-to-county migration data (2022–2023). Migration counts are tax returns (roughly households) moving between U.S. counties; the IRS suppresses very small flows. Growth rates, per-1,000 figures, rent share and state ranks are BizyFi calculations. Data updated 2026-10-17. This product uses the Census Bureau Data API but is not endorsed or certified by the Census Bureau.