Home > IA > Keokuk County > Harper > Zip 52231

Zip Code 52231 — Harper, IA

52231 is a ZIP Code associated with Harper, IA, located within Keokuk. The postal region supports an estimated population of 539 residents across Data Pending housing units, with a population density of 6.0 people per square mile.
WorldPlaceData database updated: October 2026

📍 View location on OpenStreetMap (41.363710, -92.059120)

Data MetricLocal Statistic
Postal / Zip Code52231
Primary CityHarper
State / ProvinceIA
CountyKeokuk
Total Population539
Median Household IncomeData Pending
Total Housing UnitsData Pending
Population Density6.0 people/sq mi
TimezoneAmerica/Chicago

How 52231 Compares

MetricZIP 52231Keokuk CountyIA State Average
Population5399,1203,210,984
Median IncomeData PendingN/AN/A
Population Density6.0 /sq mi----

Nearby ZIP Codes

ZIP CodeCityDistancePopulationMedian Income
Zip 52248Keota6.4 mi1,675N/A
Zip 52335South English6.6 mi644N/A
Zip 52591Sigourney7.7 mi2,721N/A
Zip 52355Webster9.2 mi283N/A
Zip 52576Ollie10.8 mi371N/A

Data Sources & Methodology: Geographic coordinates and ZIP Code assignments are derived from underlying geographic and postal datasets. Note that ZIP Codes are USPS postal delivery areas, while Census ZCTAs are statistical approximation areas. Read full methodology →