Market insights · Illinois
McHenry County, IL: growth, migration and housing
McHenry County has 317,751 residents, up 2.5% since 2020 (+0.6% in the last year). In 2022–2023, 7,918 households moved in and 7,835 moved out (+83 net), while a net $22.4M of income left. Median household income is $104,802, the median home $308,100 and median rent $1,401 a month.
In Illinois: 4th of 102 counties for 5-year population growth · 16th of 102 counties for net in-migration (per resident) · 5th of 102 counties for median household income · 7th of 102 counties for median home value.
Where new residents came from
Top counties by households (tax returns) moving to McHenry County, 2022–2023 (IRS).
| From | Households (tax returns) | Their income (AGI) |
|---|---|---|
| Cook County, IL | 2,305 | $184.0M |
| Lake County, IL | 1,276 | $106.8M |
| Kane County, IL | 1,142 | $82.0M |
| DuPage County, IL | 448 | $36.6M |
| Walworth County, WI | 138 | $7.6M |
| Winnebago County, IL | 132 | $8.3M |
| Kenosha County, WI | 112 | $8.4M |
| Boone County, IL | 85 | $4.6M |
Where leavers went
Top counties by households leaving McHenry County, 2022–2023 (IRS).
| To | Households (tax returns) | Their income (AGI) |
|---|---|---|
| Cook County, IL | 1,307 | $89.1M |
| Lake County, IL | 944 | $85.4M |
| Kane County, IL | 857 | $59.1M |
| DuPage County, IL | 250 | $19.1M |
| Walworth County, WI | 198 | $19.0M |
| Winnebago County, IL | 182 | $10.7M |
| Boone County, IL | 151 | $9.1M |
| Maricopa County, AZ | 149 | $11.5M |
BizyFi in McHenry County
Fewer than 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.