Market insights · Illinois
Johnson County, IL: growth, migration and housing
Johnson County has 13,363 residents, up 0.3% since 2020 (+0.1% in the last year). In 2022–2023, 249 households moved in and 275 moved out (-26 net), bringing in a net $0.3M of income. Median household income is $62,528, the median home $160,500 and median rent $781 a month.
In Illinois: 15th of 102 counties for 5-year population growth · 58th of 102 counties for net in-migration (per resident) · 72nd of 102 counties for median household income · 32nd of 102 counties for median home value.
Where new residents came from
Top counties by households (tax returns) moving to Johnson County, 2022–2023 (IRS).
| From | Households (tax returns) | Their income (AGI) |
|---|---|---|
| Williamson County, IL | 67 | $4.5M |
| Union County, IL | 21 | $1.6M |
Where leavers went
Top counties by households leaving Johnson County, 2022–2023 (IRS).
| To | Households (tax returns) | Their income (AGI) |
|---|---|---|
| Williamson County, IL | 72 | $4.2M |
| Union County, IL | 23 | $1.1M |
BizyFi in Johnson County
No companies in the BizyFi directory are based here yet. Search them on the company map (company names with a free account), or browse Illinois companies.
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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.