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Zip Code 50140 — Lamoni, IA

50140 is a ZIP Code associated with Lamoni, IA, located within Decatur. 50140 ranks #1 out of 7 ZIP codes in Decatur County by population (and #211 out of 970 in IA). The area supports an estimated population of 2,842 residents across Data Pending housing units, with a population density of 11.8 people per square mile.
WorldPlaceData database updated: October 2026

📍 View location on OpenStreetMap (40.637530, -93.991980)

Data MetricLocal Statistic
Postal / Zip Code50140
Primary CityLamoni
State / ProvinceIA
CountyDecatur
Total Population2,842
Median Household IncomeData Pending
Total Housing UnitsData Pending
Population Density11.8 people/sq mi
TimezoneAmerica/Chicago

How 50140 Compares

MetricZIP 50140Decatur CountyIA State Average
Population2,8427,497 (Total)3,210,984 (Total)
Average ZIP IncomeData PendingN/AN/A
Population Density11.8 /sq mi----
County Pop Rank#1 of 7----

Nearby ZIP Codes

ZIP CodeCityDistancePopulationMedian Income
Zip 50133Kellerton7.0 mi528N/A
Zip 50067Decatur8.4 mi354N/A
Zip 50065Davis City11.2 mi517N/A
Zip 50854Mount Ayr12.5 mi2,391N/A
Zip 50108Grand River13.1 mi376N/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 →