Market insights · Iowa
Marion County, IA: growth, migration and housing
Marion County has 34,192 residents, up 2.3% since 2020 (+0.7% in the last year). In 2022–2023, 862 households moved in and 848 moved out (+14 net), bringing in a net $7.9M of income. Median household income is $78,680, the median home $233,000 and median rent $884 a month.
In Iowa: 13th of 99 counties for 5-year population growth · 14th of 99 counties for net in-migration (per resident) · 15th of 99 counties for median household income · 12th of 99 counties for median home value.
Where new residents came from
Top counties by households (tax returns) moving to Marion County, 2022–2023 (IRS).
| From | Households (tax returns) | Their income (AGI) |
|---|---|---|
| Polk County, IA | 154 | $9.7M |
| Mahaska County, IA | 87 | $7.5M |
| Jasper County, IA | 58 | $3.1M |
| Warren County, IA | 53 | $3.5M |
| Wapello County, IA | 31 | $1.4M |
Where leavers went
Top counties by households leaving Marion County, 2022–2023 (IRS).
| To | Households (tax returns) | Their income (AGI) |
|---|---|---|
| Polk County, IA | 179 | $9.9M |
| Mahaska County, IA | 85 | $5.6M |
| Jasper County, IA | 69 | $3.5M |
| Warren County, IA | 57 | $4.2M |
| Dallas County, IA | 33 | $1.7M |
BizyFi in Marion 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.