Hammond Louisiana ZIP Codes

Hammond holds 4 ZIP codes, all inside one parish and one postal prefix.

Every ZIP code in Hammond

The complete list of Hammond, Louisiana ZIP codes with the parish each falls in.
ZIP code	Parish
70401	Tangipahoa Parish
70402	Tangipahoa Parish
70403	Tangipahoa Parish
70404	Tangipahoa Parish

We do not publish a delivery type (standard, PO box, unique) or a neighbourhood for each ZIP. USPS delivery-type products are licensed, and no clean-rights source maps ZIP codes to neighbourhoods — so the Hammond codes above are listed without a column we would have to invent.

Scope every ZIP code recorded for Hammond. Source GeoNames US postal codes (2026-07 postal dump) and Census 2024 county Gazetteer (2024 Gazetteer). Updated 15 July 2026. ZIP codes are delivery-route groupings, not areas; the boundaries implied by any ZIP map are approximations.

How these codes cluster

Every Hammond ZIP code begins 704. Those first three digits identify the sectional center facility that processes mail for this part of Louisiana. Statewide that range covers 47 ZIP codes, so Hammond accounts for 9% of it.

Every Louisiana ZIP prefix and the region it covers →

Area codes covering Hammond

ZIP codes and area codes are separate systems — one routes mail, the other routes calls — and they do not share boundaries. The codes below serve the same ground Hammond occupies.

Hammond Louisiana area codes in full →

Where Hammond's ZIP codes sit

Each point is one Hammond ZIP code, plotted from its record coordinates. The outline is the convex envelope of those points — a footprint, not a boundary.

Reference points and footprint
Not an official NANPA boundary
Not a USPS delivery area

Cities near Hammond

The closest places to Hammond with their own ZIP code list, nearest first.
City	Distance	ZIP codes
Ponchatoula Louisiana ZIP codes	4.6 mi	1 ZIP code
Tickfaw Louisiana ZIP codes	5.3 mi	1 ZIP code
Albany Louisiana ZIP codes	7.6 mi	1 ZIP code
Springfield Louisiana ZIP codes	7.6 mi	1 ZIP code
Independence Louisiana ZIP codes	9.5 mi	1 ZIP code
Amite Louisiana ZIP codes	16 mi	1 ZIP code
Livingston Louisiana ZIP codes	17 mi	1 ZIP code
Folsom Louisiana ZIP codes	18 mi	1 ZIP code

Straight-line distance between place reference points, not driving distance.