Market insights · Iowa
O'Brien County, IA: growth, migration and housing
O'Brien County has 14,220 residents, up 0.5% since 2020 (+0.2% in the last year). In 2022–2023, 316 households moved in and 382 moved out (-66 net), while a net $5.3M of income left. Median household income is $68,356, the median home $173,100 and median rent $868 a month.
In Iowa: 27th of 99 counties for 5-year population growth · 85th of 99 counties for net in-migration (per resident) · 62nd of 99 counties for median household income · 40th of 99 counties for median home value.
Where new residents came from
Top counties by households (tax returns) moving to O'Brien County, 2022–2023 (IRS).
| From | Households (tax returns) | Their income (AGI) |
|---|---|---|
| Sioux County, IA | 61 | $3.5M |
| Osceola County, IA | 32 | $1.7M |
| Clay County, IA | 21 | $1.1M |
Where leavers went
Top counties by households leaving O'Brien County, 2022–2023 (IRS).
| To | Households (tax returns) | Their income (AGI) |
|---|---|---|
| Sioux County, IA | 45 | $4.4M |
| Clay County, IA | 26 | $1.5M |
| Dickinson County, IA | 26 | $2.6M |
BizyFi in O'Brien County
No companies in the BizyFi directory are based here yet. Search them on the company map (company names with a free account), or browse Iowa companies.
← All Iowa counties · National rankings
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.