Home > IA > Monona County > Castana > Zip 51010

Zip Code 51010 — Castana, IA

51010 is a ZIP Code associated with Castana, IA, located within Monona. 51010 ranks #6 out of 9 ZIP codes in Monona County by population (and #714 out of 970 in IA). The area supports an estimated population of 425 residents across Data Pending housing units, with a population density of 2.3 people per square mile.
WorldPlaceData database updated: October 2026

📍 View location on OpenStreetMap (42.093090, -95.920440)

Data MetricLocal Statistic
Postal / Zip Code51010
Primary CityCastana
State / ProvinceIA
CountyMonona
Total Population425
Median Household IncomeData Pending
Total Housing UnitsData Pending
Population Density2.3 people/sq mi
TimezoneAmerica/Chicago

How 51010 Compares

MetricZIP 51010Monona CountyIA State Average
Population4258,715 (Total)3,210,984 (Total)
Average ZIP IncomeData PendingN/AN/A
Population Density2.3 /sq mi----
County Pop Rank#6 of 9----

Nearby ZIP Codes

ZIP CodeCityDistancePopulationMedian Income
Zip 51051Rodney8.1 mi39N/A
Zip 51034Mapleton8.2 mi1,674N/A
Zip 51040Onawa8.8 mi3,500N/A
Zip 51572Soldier9.8 mi371N/A
Zip 51056Smithland9.9 mi346N/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 →