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Zip Code 51640 — Hamburg, IA

51640 is a ZIP Code associated with Hamburg, IA, located within Fremont. The postal region supports an estimated population of 1,381 residents across Data Pending housing units, with a population density of 4.6 people per square mile.
WorldPlaceData database updated: October 2026

📍 View location on OpenStreetMap (40.622620, -95.663400)

Data MetricLocal Statistic
Postal / Zip Code51640
Primary CityHamburg
State / ProvinceIA
CountyFremont
Total Population1,381
Median Household IncomeData Pending
Total Housing UnitsData Pending
Population Density4.6 people/sq mi
TimezoneAmerica/Chicago

How 51640 Compares

MetricZIP 51640Fremont CountyIA State Average
Population1,3816,8593,210,984
Median IncomeData PendingN/AN/A
Population Density4.6 /sq mi----

Nearby ZIP Codes

ZIP CodeCityDistancePopulationMedian Income
Zip 51650Riverton6.9 mi197N/A
Zip 51652Sidney10.4 mi1,569N/A
Zip 51648Percival11.0 mi257N/A
Zip 51639Farragut12.0 mi919N/A
Zip 51654Thurman15.3 mi325N/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 →