Market insights · Illinois
Lake County, IL: growth, migration and housing
Lake County has 719,339 residents, up 0.8% since 2020 (+0.1% in the last year). In 2022–2023, 14,956 households moved in and 18,002 moved out (-3,046 net), while a net $144.5M of income left. Median household income is $110,416, the median home $345,700 and median rent $1,477 a month.
In Illinois: 9th of 102 counties for 5-year population growth · 89th of 102 counties for net in-migration (per resident) · 3rd of 102 counties for median household income · 2nd of 102 counties for median home value.
Where new residents came from
Top counties by households (tax returns) moving to Lake County, 2022–2023 (IRS).
| From | Households (tax returns) | Their income (AGI) |
|---|---|---|
| Cook County, IL | 6,447 | $1227.1M |
| McHenry County, IL | 944 | $85.4M |
| DuPage County, IL | 523 | $48.7M |
| Kenosha County, WI | 496 | $32.1M |
| Kane County, IL | 233 | $17.9M |
| Milwaukee County, WI | 180 | $15.5M |
| San Diego County, CA | 157 | $12.0M |
| Los Angeles County, CA | 151 | $13.2M |
Where leavers went
Top counties by households leaving Lake County, 2022–2023 (IRS).
| To | Households (tax returns) | Their income (AGI) |
|---|---|---|
| Cook County, IL | 4,959 | $620.8M |
| McHenry County, IL | 1,276 | $106.8M |
| Kenosha County, WI | 984 | $59.7M |
| DuPage County, IL | 397 | $42.2M |
| Milwaukee County, WI | 319 | $16.4M |
| Maricopa County, AZ | 313 | $47.5M |
| Kane County, IL | 270 | $26.6M |
| Racine County, WI | 215 | $23.5M |
BizyFi in Lake County
5 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.