O'Brien County, Iowa
O'Brien County, Iowa · ZIP 51009, 51022, 51029
- Census data · ACS 2019-2023
- 14,260 (2024 estimate)Population
- 5,791Households
- $68,216Median household income
- $158,900Median home value
- 8Towns with a page
- 13ZIP codes
O'Brien County in numbersOfficial sources, refreshed yearly
| Census | Population |
|---|---|
| 2000 | 15,102 |
| 2010 | 14,398 |
| 2020 | 14,182 |
As counted at each census, within the boundaries the area had then; the current estimate is in the glance card.
Sources: Census 2000 Summary File 1: total population, county level, state 19, retrieved November 14, 2026; Census 2010 Summary File 1: total population, county level, state 19, retrieved November 14, 2026; Census 2020 Redistricting Data (P.L. 94-171): total population, county level, state 19, retrieved November 14, 2026.
Median household income $68,216 · Share of households by income, American Community Survey 5-year 2019-2023, table S1901.
Source: American Community Survey 5-year subject table S1901 (household income) 2019–2023, county level, state 19, retrieved November 14, 2026.
- Owner occupied
- 4,477 units
- Renter occupied
- 1,314 units
- Vacancy rate
- 11.5%
Occupied housing units by tenure and the share of all units vacant, American Community Survey 5-year 2019-2023, table DP04.
Source: American Community Survey 5-year data profile 2019–2023, county level, state 19, retrieved November 14, 2026.
5,332 employees in 488 establishments with payroll in 2023, all sectors; employers themselves are not named in the source. County Business Patterns counts are published with noise.
Source: County Business Patterns 2023: employment by sector, county level, state 19, retrieved November 14, 2026.
| Measure | O'Brien County | Iowa |
|---|---|---|
| Population | 14,103 | 3,195,937 |
| Median household income | $68,216 | $73,147 |
| Median age | 39.8 | 38.6 |
| Median home value | $158,900 | $195,900 |
| Bachelor’s degree or higher | 22.5% | 30.9% |
| Foreign-born residents | 4.2% | 5.7% |
| Owner-occupied homes | 77.3% | 71.5% |
| Mean commute to work | 18.4 minutes | 19.8 minutes |
Source: American Community Survey 5-year data profile 2019–2023, county level, state 19, retrieved November 14, 2026.
Townships, towns and villages in O'Brien County8 with a page · sort by any column
Populations: Census Population Estimates, Vintage 2024: subcounty totals, state 19 (2024). Land areas: Census Gazetteer 2025: counties. A dash means the figure is not in the cited file.
County officialsFrom public records
No county official is published yet. Names appear once a researcher drafts them from the county’s own site and a second person approves; office contacts only, never personal details.
Across O'Brien County
No job is posted in O'Brien County’s towns yet. Employers post from their business dashboard; public job banks are added once their terms are recorded.
No upcoming event is listed in O'Brien County's towns yet. Members and businesses add events from any town page.
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Neighboring counties
Neighboring counties
- Buena Vista CountyPopulation 20,816 (2024 estimate)
- Cherokee CountyPopulation 11,658 (2024 estimate)
- Clay CountyPopulation 16,474 (2024 estimate)
- Dickinson CountyPopulation 18,158 (2024 estimate)
- Lyon CountyPopulation 12,378 (2024 estimate)
- Osceola CountyPopulation 6,036 (2024 estimate)
- Plymouth CountyPopulation 25,825 (2024 estimate)
- Sioux CountyPopulation 36,554 (2024 estimate)
Sources: Census county adjacency file 2024, retrieved November 14, 2026; Census Population Estimates, Vintage 2024: subcounty totals, state 19, retrieved November 14, 2026.