Find the last 4 digits (ZIP+4) for an address in 51640

ZIP 51640, Hamburg, IA is filled in. Just type the street address.

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ZIP Code 51640 – Hamburg, IA

Hamburg, Iowa · Fremont County · Central time

ZIP code51640
CityHamburg
StateIowa
CountyFremont CountyAtchison County
Population1,381
Time zoneCentral · local time
ZIP typeStandard (has a Census ZCTA area)
Land area115.41 sq mi
Center (lat, long)40.6262, -95.6614

Area codes in this area

712

These are the area codes that most often serve ZIP 51640 (including overlays). The exact area code depends on the phone number — landlines, mobiles and overlays can differ even on the same street.

Map

Nearby ZIP codes

51650 Riverton · 6.8 mi64496 Watson · 9.1 mi68421 Peru · 10.1 mi51652 Sidney · 10.3 mi51648 Percival · 10.7 mi68410 Nebraska City · 11.7 mi51639 Farragut · 12.1 mi68379 Julian · 12.8 mi

About ZIP 51640

ZIP code 51640 is assigned to Hamburg, Iowa. It crosses 2 counties; most of its land is in Fremont County. Its Census area covers about 115.41 square miles of land. The closest neighboring ZIP is 51650 (Riverton), about 6.8 miles away.

Every address in 51640 also has a 4-digit add-on code (ZIP+4) that points to a smaller delivery area. Use the box above to find it.

Sources: US Census Bureau (ZCTA, county relationship files), GeoNames (CC BY 4.0), NANPA via NumberResearch.org (CC BY 4.0). Map © OpenStreetMap contributors. ZIP areas are approximate. Population: U.S. Census Bureau, ACS 5-year estimates, 2024 (ZCTA). Data sources