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City ZIP codes · Louisiana

Hammond, LA ZIP Codes

4 ZIP codes use the postal name Hammond, Louisiana (Census 2020 ZCTAs and GeoNames postal codes, October 2026): 3 residential and 1 for PO boxes or a single organization. Median household income runs from $50,653 in 70401 to $50,976 in 70403 (Census Bureau, ACS 2020-2024). Hammond's most populous ZIP code is 70403, with 30,173 people (ACS 2020-2024); 14% of its land is in the city of Hammond.

  • ACS2020-24
  • Census2020
  • GeoNames2026

Where are Hammond's ZIP codes?

70401: $51k median household income70402: – median household income70403: $51k median household income704037040170401: $51k median household income70402: – median household income70403: $51k median household income704037040170401: $51k median household income70402: – median household income70403: $51k median household income7040370401
The 3 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 70403 ($50,976), the lowest in 70401 ($50,653). Home values run from $211,000 in 70401 to $212,400 in 70403.

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

All 3 residential ZIP codes of Hammond

Residential ZIP codes with the postal name Hammond, LA, largest first (ACS 2020-2024); sort by any column
County
70403 Tangipahoa Parish 30,173 713 $51k $212k
70401 Tangipahoa Parish 21,221 612 $51k $211k
70402 Tangipahoa Parish 1,850 15,041 – –

Download the 4 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, LA: ZIP codes without a residential area, for PO boxes or one organization (GeoNames postal codes; USPS does not publish openly which is which)
ZIPCounty
70404Tangipahoa Parish

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 2 counties: Tangipahoa Parish (3 ZIP codes mainly there), Livingston Parish (part of a ZIP code).

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 704.

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
704 New Orleans, LA (SCF 700) 4 47

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