Market insights · Illinois
Rock Island County, IL: growth, migration and housing
Rock Island County has 141,869 residents, down 1.7% since 2020 (+0.2% in the last year). In 2022–2023, 2,991 households moved in and 3,271 moved out (-280 net), while a net $68.4M of income left. Median household income is $67,159, the median home $150,400 and median rent $889 a month.
In Illinois: 45th of 102 counties for 5-year population growth · 60th of 102 counties for net in-migration (per resident) · 50th of 102 counties for median household income · 38th of 102 counties for median home value.
Where new residents came from
Top counties by households (tax returns) moving to Rock Island County, 2022–2023 (IRS).
| From | Households (tax returns) | Their income (AGI) |
|---|---|---|
| Scott County, IA | 870 | $46.6M |
| Henry County, IL | 317 | $14.8M |
| Cook County, IL | 115 | $4.9M |
| Mercer County, IL | 108 | $6.8M |
| Whiteside County, IL | 55 | $2.6M |
| Muscatine County, IA | 52 | $2.9M |
| Johnson County, IA | 36 | $1.9M |
| Knox County, IL | 34 | $1.6M |
Where leavers went
Top counties by households leaving Rock Island County, 2022–2023 (IRS).
| To | Households (tax returns) | Their income (AGI) |
|---|---|---|
| Scott County, IA | 958 | $58.9M |
| Henry County, IL | 278 | $17.3M |
| Mercer County, IL | 125 | $6.9M |
| Cook County, IL | 120 | $6.0M |
| Johnson County, IA | 58 | $3.0M |
| Muscatine County, IA | 48 | $2.2M |
| Clinton County, IA | 46 | $3.0M |
| Whiteside County, IL | 45 | $2.4M |
BizyFi in Rock Island 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.