Market insights · Iowa
Sioux County, IA: growth, migration and housing
Sioux County has 36,774 residents, up 2.5% since 2020 (-0.0% in the last year). In 2022–2023, 509 households moved in and 661 moved out (-152 net), while a net $4.7M of income left. Median household income is $86,098, the median home $250,100 and median rent $908 a month.
In Iowa: 12th of 99 counties for 5-year population growth · 77th of 99 counties for net in-migration (per resident) · 8th of 99 counties for median household income · 8th of 99 counties for median home value.
Where new residents came from
Top counties by households (tax returns) moving to Sioux County, 2022–2023 (IRS).
| From | Households (tax returns) | Their income (AGI) |
|---|---|---|
| Lyon County, IA | 51 | $2.9M |
| O'Brien County, IA | 45 | $4.4M |
| Plymouth County, IA | 45 | $2.1M |
| Minnehaha County, SD | 32 | $2.1M |
| Woodbury County, IA | 27 | $1.3M |
Where leavers went
Top counties by households leaving Sioux County, 2022–2023 (IRS).
| To | Households (tax returns) | Their income (AGI) |
|---|---|---|
| O'Brien County, IA | 61 | $3.5M |
| Plymouth County, IA | 46 | $2.4M |
| Minnehaha County, SD | 43 | $2.2M |
| Lincoln County, SD | 39 | $2.1M |
| Lyon County, IA | 37 | $2.3M |
| Dickinson County, IA | 21 | $2.3M |
| Woodbury County, IA | 21 | $0.7M |
BizyFi in Sioux 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.