Market insights · Illinois
DeKalb County, IL: growth, migration and housing
DeKalb County has 101,835 residents, up 1.5% since 2020 (+1.2% in the last year). In 2022–2023, 3,061 households moved in and 3,153 moved out (-92 net), while a net $1.7M of income left. Median household income is $70,724, the median home $243,600 and median rent $1,049 a month.
In Illinois: 8th of 102 counties for 5-year population growth · 35th of 102 counties for net in-migration (per resident) · 42nd of 102 counties for median household income · 10th of 102 counties for median home value.
Where new residents came from
Top counties by households (tax returns) moving to DeKalb County, 2022–2023 (IRS).
| From | Households (tax returns) | Their income (AGI) |
|---|---|---|
| Kane County, IL | 621 | $35.7M |
| Cook County, IL | 466 | $21.3M |
| DuPage County, IL | 256 | $15.8M |
| Kendall County, IL | 208 | $11.9M |
| LaSalle County, IL | 114 | $5.9M |
| Winnebago County, IL | 112 | $4.1M |
| Ogle County, IL | 103 | $5.1M |
| Will County, IL | 100 | $5.1M |
Where leavers went
Top counties by households leaving DeKalb County, 2022–2023 (IRS).
| To | Households (tax returns) | Their income (AGI) |
|---|---|---|
| Cook County, IL | 399 | $15.3M |
| Kane County, IL | 387 | $23.0M |
| DuPage County, IL | 193 | $9.1M |
| Kendall County, IL | 144 | $7.9M |
| Winnebago County, IL | 144 | $6.2M |
| Ogle County, IL | 137 | $7.1M |
| LaSalle County, IL | 118 | $7.1M |
| McHenry County, IL | 83 | $4.5M |
BizyFi in DeKalb 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.