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City ZIP codes · Indiana

Hammond, IN ZIP Codes

5 ZIP codes use the postal name Hammond, Indiana (Census 2020 ZCTAs and GeoNames postal codes, October 2026): 4 residential and 1 for PO boxes or a single organization. Median household income runs from $37,158 in 46320 to $63,052 in 46324, 1.7 times as much (Census Bureau, ACS 2020-2024). Hammond's most populous ZIP code is 46323, with 23,047 people (ACS 2020-2024); 100% of its land is in the city of Hammond.

  • ACS2020-24
  • Census2020
  • GeoNames2026

Where are Hammond's ZIP codes?

46320: $37k median household income46323: $60k median household income46324: $63k median household income46327: $47k median household income4632046323463244632746320: $37k median household income46323: $60k median household income46324: $63k median household income46327: $47k median household income4632046323463244632746320: $37k median household income46323: $60k median household income46324: $63k median household income46327: $47k median household income46320463234632446327
The 4 residential ZIP codes named Hammond, shaded by median household income in national fifths (ACS 2020-2024). Select a ZIP to open it. <$54.1k$98.1k+no figure

Source: U.S. Census Bureau, 2020 ZCTA cartographic boundaries; ACS 2020-2024 5-year estimates (B19013).

How different are Hammond's ZIP codes?

The highest median household income is in 46324 ($63,052), the lowest in 46320 ($37,158). Home values run from $135,000 in 46320 to $166,400 in 46323.

Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B19013, B25077, B01003).

All 4 residential ZIP codes of Hammond

Residential ZIP codes with the postal name Hammond, IN, largest first (ACS 2020-2024); sort by any column
County
46323 Lake County 23,047 3,717 $60k $166k
46324 Lake County 21,409 4,910 $63k $159k
46320 Lake County 14,353 3,082 $37k $135k
46327 Lake County 10,597 2,303 $47k $142k

Download the 5 ZIP codes as CSV

Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates; 2023 Gazetteer land areas (2020 ZCTAs); town names from simplemaps US ZIP Codes (CC BY 4.0) and GeoNames (CC BY 4.0).

PO Box and single-organization ZIP codes in Hammond

1 ZIP code named Hammond has no residential delivery area: post office boxes, or one organization (a large employer, an agency, a university) with its own code. The Census Bureau publishes no figures for them.

Hammond, IN: ZIP codes without a residential area, for PO boxes or one organization (GeoNames postal codes; USPS does not publish openly which is which)
ZIPCounty
46325Lake County

Source: GeoNames postal codes (CC BY 4.0); a ZIP code with no Census ZCTA has no residential delivery area.

Which counties do Hammond's ZIP codes reach?

Hammond's residential ZIP codes lie in Lake County.

Which first three digits do Hammond's ZIP codes use?

The first three digits of a ZIP code name the sectional center, the mail processing plant that sorts it. Every ZIP code of Hammond starts with 463.

Three-digit prefixes of Hammond's ZIP codes, the sectional center for each (USPS labeling list L005, effective October 1, 2026) and how many of the prefix's codes are Hammond's
PrefixSectional centerHereAll codes
463 Gary, IN (SCF 463) 5 53

Source: U.S. Postal Service, labeling list L005 (3-digit ZIP Code prefix groups, SCF sortation), effective October 1, 2026.