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ZIP Code 51231
Archer, IA, O'Brien County
Population
562
Land area
24.2sq mi
People per sq mi
23
City
Archer
ZIP 51231 and nearby ZIP codes
ZIP 51231 at a glance
- ZIP 51231 (Archer) is 60% less dense than Iowa as a whole.
- The median household income is $108,058, 44% above the Iowa median of $75,059.
- A typical owner-occupied home is valued at $189,500 (9% below Iowa).
Local data for ZIP 51231
Counts from official public data
Housing and community stats
ZIP 51231, American Community Survey 2020-2024
Median household income
$108,058
Poverty rate
29.7%
Median home value
$189,500
Homeownership
94.3%
Bachelor's or higher
33.5%
Median age
15.1
Average commute
26.1 min
Economy and federal money
Businesses, pandemic loans and political donations
Business establishments
6
ZIP Business Patterns 2023
Employees
63
$3.4M annual payroll
PPP loans
$1.5M
50 loans
Campaign donations
$913
Itemized, 2026 cycle
Environment and hazard risk
ZIP 51231, from FEMA, NOAA and EPA
Natural hazard risk
Very Low
Top: hail
Storm events since 1996
721
Countywide, mostly hail
Flood insurance policies
5
0.1% of homes, county
July high / Jan low
85° / 9°F
31.3 inches of rain a year
Health statistics
Share of adults in ZIP 51231, CDC PLACES estimates
Obesity
40.0%
U.S. 33.3% +6.7 pts
Diabetes
12.3%
U.S. 12.1% about the same
Smoking
17.8%
U.S. 12.8% +5.0 pts
Uninsured (18-64)
6.9%
U.S. 11.1% -4.2 pts
Frequently asked questions
- What city is ZIP code 51231?
- ZIP code 51231 is in Archer, IA (O'Brien County).
- What county is ZIP code 51231 in?
- ZIP code 51231 is mostly in O'Brien County, Iowa.
- How many people live in ZIP code 51231?
- About 562 people live in the 51231 ZIP Code Tabulation Area, based on American Community Survey 5-year estimates.
Source: U.S. Census Bureau (ZIP Code Tabulation Areas, American Community Survey) · Data as of 12/31/2023. ZIP Code Tabulation Areas closely match, but are not identical to, USPS ZIP code delivery areas.