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Zip Code 52231 — Harper, IA

ZIP Code 52231 is associated with Harper, IA, in Keokuk County. The listed population estimate is 539; estimated density is 6.0 people per square mile. Among records with population estimates, it ranks #7 of 14 in Keokuk County and #660 of 969 in IA.
Page generated: 2026-10-08. This is not the source data release date.

📍 View location on OpenStreetMap (41.363710, -92.059120)

Data MetricLocal Statistic
Postal / Zip Code52231
Primary CityHarper
State / ProvinceIA
CountyKeokuk
Total Population539
Population Density6.0 people/sq mi
TimezoneAmerica/Chicago

How 52231 Compares

MetricZIP 52231Keokuk County recordsIA records
Population estimate5399,120 (sum)3,210,984 (sum)
Population Density6.0 /sq mi----
County population rank#7 of 14----
State population rank#660 of 969----

Regional sums combine the population estimates in the listed ZIP records; they are not official county or state population totals.

Explore More ZIP Codes

Nearby ZIP Codes in IA

ZIP CodeCityDistancePopulation estimate
ZIP 52248Keota6.4 mi1,675
ZIP 52335South English6.6 mi644
ZIP 52591Sigourney7.7 mi2,721
ZIP 52355Webster9.2 mi283
ZIP 52576Ollie10.8 mi371

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 →