County ProfileIA
O'Brien County
Population: 14,182 · 8 ZIP codes
Demographics
Source: U.S. Census Bureau (ACS/Decennial). Estimates vary by year.
People
Total population
14,182
People
Median age
39.5
Housing
Total households
5,809
Income
Median household income
$68,356
Housing
Total housing units
6,564
Employment
Employment rate
65%
Education
Bachelor’s degree or higher
22%
Healthcare
Insured population
97%
County details
Local time 05:36:18(CT)| Name | O'Brien |
|---|---|
| Total ZIP codes | 8total |
| ZIP codes (by type) | 7 Standard1 PO Box |
| Area code | 712 |
| Timezone | Central Time (CT) |
| Coordinates | 43.0837455, -95.6256244 |
| Land area | 573 sq miles(1,484.2 km²) |
Map of O'Brien county, Iowa with ZIP codes
Cities and Communities in O'Brien County
Compare the largest cities in O'Brien County by population, median income, and growth. Use the table below to analyze key demographic shifts across the region.
— Data unavailable or suppressed by the U.S. Census Bureau for areas with small sample sizes to protect individual privacy.
ZIP Codes in O'Brien County
Review the most populated postal areas across O'Brien County. Use the ranking below to compare resident density and demographic scales between the county's major zones.
Data Sources & Citations
The geographic and demographic information presented on this site is compiled from publicly available, authoritative sources, including:
- United States Census BureauDemographic, population, housing, and socioeconomic data sourced from Census Bureau datasets, including the Decennial Census and the American Community Survey (ACS).Census Data
- United States Postal Service (USPS)ZIP code classifications, delivery types, and postal designations used for reference purposes. USPS ZIP codes are intended for mail delivery and may not always align exactly with Census geographic boundaries.USPS