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Zip Code 50440 — Grafton, IA

50440 is a ZIP Code associated with Grafton, IA, located within Worth. 50440 ranks #7 out of 7 ZIP codes in Worth County by population (and #764 out of 970 in IA). The area supports an estimated population of 361 residents across Data Pending housing units, with a population density of 4.8 people per square mile.
WorldPlaceData database updated: October 2026

📍 View location on OpenStreetMap (43.332130, -93.068910)

Data MetricLocal Statistic
Postal / Zip Code50440
Primary CityGrafton
State / ProvinceIA
CountyWorth
Total Population361
Median Household IncomeData Pending
Total Housing UnitsData Pending
Population Density4.8 people/sq mi
TimezoneAmerica/Chicago

How 50440 Compares

MetricZIP 50440Worth CountyIA State Average
Population3616,991 (Total)3,210,984 (Total)
Average ZIP IncomeData PendingN/AN/A
Population Density4.8 /sq mi----
County Pop Rank#7 of 7----

Nearby ZIP Codes

ZIP CodeCityDistancePopulationMedian Income
Zip 50464Plymouth5.6 mi694N/A
Zip 50426Carpenter6.3 mi81N/A
Zip 50456Manly8.0 mi1,699N/A
Zip 50467Rock Falls8.5 mi63N/A
Zip 50472Saint Ansgar8.8 mi2,560N/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 →