Market insights · Iowa
Washington County, IA: growth, migration and housing
Washington County has 22,667 residents, up 0.6% since 2020 (+0.3% in the last year). In 2022–2023, 563 households moved in and 568 moved out (-5 net), bringing in a net $6.5M of income. Median household income is $75,647, the median home $203,900 and median rent $879 a month.
In Iowa: 25th of 99 counties for 5-year population growth · 25th of 99 counties for net in-migration (per resident) · 26th of 99 counties for median household income · 22nd of 99 counties for median home value.
Where new residents came from
Top counties by households (tax returns) moving to Washington County, 2022–2023 (IRS).
| From | Households (tax returns) | Their income (AGI) |
|---|---|---|
| Johnson County, IA | 152 | $10.9M |
| Linn County, IA | 45 | $2.8M |
| Henry County, IA | 36 | $1.4M |
| Keokuk County, IA | 31 | $1.4M |
Where leavers went
Top counties by households leaving Washington County, 2022–2023 (IRS).
| To | Households (tax returns) | Their income (AGI) |
|---|---|---|
| Johnson County, IA | 121 | $7.1M |
| Linn County, IA | 48 | $2.4M |
| Henry County, IA | 36 | $1.6M |
| Keokuk County, IA | 28 | $1.8M |
| Polk County, IA | 21 | $1.4M |
BizyFi in Washington 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.