City · Indiana · United States

Hammond, IN — ZIP codes

5 ZIP codes · Lake County

City: Hammond
County: Lake
State: Indiana
Country: United States
Postal codes: 4632046323463244632546327
Single source
Coordinates: 41.6099, -87.5079 View on OpenStreetMap
Area code: 219

ZIP codes (5)

Postal code	Place name	Verification
46320	Hammond	Single source
46323	Hammond	Single source
46324	Hammond	Single source
46325	Hammond	Single source
46327	Hammond	Single source

Sources and verification

US ZIP codes have five digits. They are postal routing areas, not administrative boundaries: a ZIP can span more than one city or county, and the city shown is the primary USPS name for that code.

GeoNames · U.S. Census Bureau (ACS). Last generated : 2026-08-21. Report an error.