Market insights · Illinois
Winnebago County, IL: growth, migration and housing
Winnebago County has 283,674 residents, down 0.4% since 2020 (+0.3% in the last year). In 2022–2023, 5,351 households moved in and 5,723 moved out (-372 net), while a net $81.4M of income left. Median household income is $65,837, the median home $164,500 and median rent $1,021 a month.
In Illinois: 22nd of 102 counties for 5-year population growth · 40th of 102 counties for net in-migration (per resident) · 59th of 102 counties for median household income · 29th of 102 counties for median home value.
Where new residents came from
Top counties by households (tax returns) moving to Winnebago County, 2022–2023 (IRS).
| From | Households (tax returns) | Their income (AGI) |
|---|---|---|
| Cook County, IL | 663 | $29.0M |
| Boone County, IL | 629 | $30.6M |
| Rock County, WI | 400 | $19.4M |
| Ogle County, IL | 228 | $11.0M |
| Kane County, IL | 214 | $12.1M |
| McHenry County, IL | 182 | $10.7M |
| DuPage County, IL | 164 | $8.3M |
| DeKalb County, IL | 144 | $6.2M |
Where leavers went
Top counties by households leaving Winnebago County, 2022–2023 (IRS).
| To | Households (tax returns) | Their income (AGI) |
|---|---|---|
| Cook County, IL | 511 | $26.7M |
| Boone County, IL | 446 | $33.6M |
| Rock County, WI | 424 | $21.2M |
| Ogle County, IL | 215 | $12.7M |
| Stephenson County, IL | 161 | $7.2M |
| Dane County, WI | 135 | $6.6M |
| Kane County, IL | 134 | $7.3M |
| McHenry County, IL | 132 | $8.3M |
BizyFi in Winnebago County
3 companies in the BizyFi directory are based here. 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.