Market insights · Iowa
Marshall County, IA: growth, migration and housing
Marshall County has 39,890 residents, down 0.5% since 2020 (-0.6% in the last year). In 2022–2023, 812 households moved in and 865 moved out (-53 net), while a net $6.4M of income left. Median household income is $73,315, the median home $145,500 and median rent $885 a month.
In Iowa: 41st of 99 counties for 5-year population growth · 41st of 99 counties for net in-migration (per resident) · 37th of 99 counties for median household income · 69th of 99 counties for median home value.
Where new residents came from
Top counties by households (tax returns) moving to Marshall County, 2022–2023 (IRS).
| From | Households (tax returns) | Their income (AGI) |
|---|---|---|
| Polk County, IA | 108 | $5.2M |
| Tama County, IA | 88 | $5.4M |
| Story County, IA | 61 | $3.1M |
| Jasper County, IA | 31 | $1.6M |
| Linn County, IA | 28 | $1.4M |
| Grundy County, IA | 24 | $1.2M |
| Black Hawk County, IA | 23 | $1.0M |
| Hardin County, IA | 23 | $0.7M |
Where leavers went
Top counties by households leaving Marshall County, 2022–2023 (IRS).
| To | Households (tax returns) | Their income (AGI) |
|---|---|---|
| Polk County, IA | 148 | $8.0M |
| Story County, IA | 92 | $4.1M |
| Tama County, IA | 60 | $3.1M |
| Jasper County, IA | 41 | $1.8M |
| Grundy County, IA | 29 | $2.2M |
| Linn County, IA | 28 | $1.6M |
| Black Hawk County, IA | 27 | $1.0M |
| Dallas County, IA | 21 | $1.0M |
BizyFi in Marshall 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.