Zip Code 50440 — Grafton, IA

ZIP Code 50440 is associated with Grafton, IA, in Worth County. The listed population estimate is 361; estimated density is 4.8 people per square mile. Among records with population estimates, it ranks #7 of 7 in Worth County and #764 of 969 in IA.
Page generated: 2026-10-08. This is not the source data release date.

📍 View location on OpenStreetMap (43.332130, -93.068910)

Data MetricLocal Statistic
Postal / Zip Code50440
Primary CityGrafton
State / ProvinceIA
CountyWorth
Total Population361
Population Density4.8 people/sq mi
TimezoneAmerica/Chicago

How 50440 Compares

MetricZIP 50440Worth County recordsIA records
Population estimate3616,991 (sum)3,210,984 (sum)
Population Density4.8 /sq mi----
County population rank#7 of 7----
State population rank#764 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 50464Plymouth5.6 mi694
ZIP 50426Carpenter6.3 mi81
ZIP 50456Manly8.0 mi1,699
ZIP 50467Rock Falls8.5 mi63
ZIP 50472Saint Ansgar8.8 mi2,560

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 →