ZIP codes
8
O'Brien County, IA Demographics & ZIP Codes
O'Brien County, Iowa demographics and median household income by ZIP code — 8 ZIP codes — population 9,185 — avg. income $74,102 — avg. home value $138,875. Compare income, housing, and ZIP-level data on US5.
Population
9,185
Median household income (avg.)
$74,102
99% of U.S. median
Average home value
$138,875
40% of U.S. median
Average rent
$498
43% of U.S. median
O'Brien County demographics
O'Brien County, Iowa covers 8 ZIP codes, with a combined ZIP-area population of about 9,185.
Median household income in O'Brien County
The average median household income across ZIP codes in O'Brien County, Iowa is about $74,102 — about even with the IA ZIP average ($74,194), and about even with the U.S. median ($75,149).
Among ZIPs with income data, 51231 (Archer) is near the top at about $105,388, while 51009 (Calumet) is near the bottom at about $53,125.
Housing in O'Brien County
For housing in O'Brien County, Iowa, the average median home value is about $138,875 and the average median rent is about $498.
The most populous ZIP is 51346 (Hartley) with about 2,211 residents. Use the table below to compare ZIP codes across the county.
ZIP codes in O'Brien County
Sort by population, income, or home value. Click a column header to toggle ascending / descending.
| ZIP | City | County | State | Population ↓ | Income | Home value |
|---|---|---|---|---|---|---|
| 51346 | Hartley | O'Brien County | IA | 2,211 | $60,179 | $125,800 |
| 51248 | Sanborn | O'Brien County | IA | 1,643 | $60,809 | $154,400 |
| 51046 | Paullina | O'Brien County | IA | 1,407 | $81,389 | $161,200 |
| 51245 | Primghar | O'Brien County | IA | 1,264 | $78,958 | $139,500 |
| 51058 | Sutherland | O'Brien County | IA | 1,020 | $61,833 | $116,100 |
| 51022 | Granville | O'Brien County | IA | 966 | $91,133 | $169,400 |
| 51231 | Archer | O'Brien County | IA | 543 | $105,388 | $179,600 |
| 51009 | Calumet | O'Brien County | IA | 131 | $53,125 | $65,000 |
Frequently asked questions
What are the demographics of O'Brien County?
O'Brien County, Iowa has a combined ZIP-area population of about 9,185 across 8 ZIP codes. Browse the ZIP table for population, income, and housing by code.
What is the median household income in O'Brien County?
The average median household income across ZIP codes in O'Brien County, Iowa is about $74,102, roughly in line with the state ZIP average ($74,194), and near the U.S. median ($75,149). Average median home value is about $138,875. Among ZIPs with data, 51231 (Archer) is near the top ($105,388) and 51009 (Calumet) is near the bottom ($53,125).
How many ZIP codes are in O'Brien County?
O'Brien County, Iowa includes 8 ZIP codes on US5. Each row links to demographics, median income, and housing for that code.
Where can I find ZIP code demographics for O'Brien County?
This page lists ZIP codes in O'Brien County, Iowa with population, median household income, and home value. Select a ZIP for a full demographics profile.