O'Brien
Source:
Iowa
O'Brien is a sparsely populated county in Iowa with 8 ZIP codes, 14,973 people, and above-median household income among US counties. All data is sourced from the U.S. Census Bureau American Community Survey (ACS) 2023 5-Year Estimates.
National county placement
According to ACS 5-Year Estimates, O'Brien, IA sits among US counties with an above-median household income, on a sparsely populated county population base, across a compact ZIP cluster.
- Top 35%
- household income vs 3,210 US counties
- 14,973
- combined ZIP population
- 8
- USPS ZIP codes covered
- $73,638
- avg ZIP median income
Income percentile ranks this county's average ZIP median household income against 3,210 US counties with ACS income on at least one ZIP.
O'Brien lands in the national county income distribution as above-median household income on sparsely populated county footing (FIPS 19141, 8 ZIPs, combined population 14,973). Sort the ZIP table by population before treating the county mean as uniform.
Above-median income on a compact ZIP cluster (8 codes). Population density still swings from downtown to farm-edge; the density column is the fastest filter before a side-by-side compare. County-level HUD and FBI inputs still key off FIPS 19141.
Save two ZIPs from the table into your shortlist, then open a compare link - that is the return path a static county summary cannot replace. All figures here come from Census ACS 2023 5-Year Estimates and USPS ZCTA files.
8
Total ZIPs
14,973
Total Population
ZIP Codes in O'Brien
Side-by-side: Compare 51201 vs 51346 →
Frequently Asked Questions
What is the population of O'Brien?
O'Brien has a total population of 14,973 across 8 ZIP codes, based on U.S. Census Bureau ACS 2023 data.
What ZIP codes are in O'Brien?
O'Brien includes 8 ZIP codes: 51201, 51346, 51248, 51046, 51245, 51058, 51231, 51009.