Find the last 4 digits (ZIP+4) for an address in 46320

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ZIP Code 46320 – Hammond, IN

Hammond, Indiana · Lake County · Central time

ZIP code46320
CityHammond
StateIndiana
CountyLake County
Population14,353
Time zoneCentral · local time
ZIP typeStandard (has a Census ZCTA area)
Land area4.66 sq mi
Center (lat, long)41.6089, -87.4976

Area codes in this area

574

These are the area codes that most often serve ZIP 46320 (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

46324 Hammond · 1.7 mi46323 Hammond · 2.6 mi46327 Hammond · 2.7 mi60409 Calumet City · 2.8 mi46312 East Chicago · 3.7 mi60438 Lansing · 4 mi46321 Munster · 4.2 mi46406 Gary · 4.6 mi

About ZIP 46320

ZIP code 46320 is assigned to Hammond, Indiana. It lies in Lake County. Its Census area covers about 4.66 square miles of land. The closest neighboring ZIP is 46324 (Hammond), about 1.7 miles away.

Every address in 46320 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