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Zip Code 50240 — Saint Charles, IA

50240 is a ZIP Code associated with Saint Charles, IA, located within Madison. 50240 ranks #4 out of 12 ZIP codes in Madison County by population (and #238 out of 970 in IA). The area supports an estimated population of 2,393 residents across Data Pending housing units, with a population density of 12.3 people per square mile.
WorldPlaceData database updated: October 2026

📍 View location on OpenStreetMap (41.293680, -93.796000)

Data MetricLocal Statistic
Postal / Zip Code50240
Primary CitySaint Charles
State / ProvinceIA
CountyMadison
Total Population2,393
Median Household IncomeData Pending
Total Housing UnitsData Pending
Population Density12.3 people/sq mi
TimezoneAmerica/Chicago

How 50240 Compares

MetricZIP 50240Madison CountyIA State Average
Population2,39323,642 (Total)3,210,984 (Total)
Average ZIP IncomeData PendingN/AN/A
Population Density12.3 /sq mi----
County Pop Rank#4 of 12----

Nearby ZIP Codes

ZIP CodeCityDistancePopulationMedian Income
Zip 50241Saint Marys3.4 mi96N/A
Zip 50033Bevington4.6 mi12N/A
Zip 50229Prole5.6 mi1,585N/A
Zip 50218Patterson5.7 mi346N/A
Zip 50160Martensdale6.3 mi569N/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 →