Name: ZIP Code 70404 Profile
Creator: ZIP-Codes.com

Data Last Updated: February 1, 2026

City:	Hammond, Louisiana
Parish:	Tangipahoa Parish
Timezone:	Central (GMT -06:00)
Local Time:	1:38:06 AM
Population:	No Population Data
Area Code:	985
Classification:	PO Box
Coordinates:	30.5044, -90.4612
Quick Link:	https://www.zip-codes.com/zip-code/70404/zip-code-70404.asp

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In the United States, a county equivalent is a political or administrative subdivision of a state. It has a specific geographic area and some level of governmental authority. The term "county" is used in 47 states. Alaska, Louisiana, and Connecticut have functionally equivalent subdivisions called Boroughs, Parishes, and Planning Regions, respectively. They functionally act like counties by subdividing the state.

70404 Hammond, LA - Downtown Post Office

ZIP Code 70404, Hammond

Small Town Unique ZIP No Census Data

LocationTangipahoa County, LA

Area0 sq mi Single Point

Delivery Points1,192 (396 businesses)

PO Boxes796

ZIP CreatedBefore Oct 2004

Enclosed InZIP Code 70401

Key Facts

This ZIP has zero residential population because it covers only the post office building, not a neighborhood
The post office maintains 796 PO Boxes serving Hammond residents and businesses who choose box service over street delivery
All 125 street address records point to NW Railroad Avenue, the post office location
With 396 business delivery points, this ZIP functions as a commercial mail hub for downtown Hammond
The ZIP is enclosed within 70401, Hammond's main residential ZIP code that handles street delivery

A Point-Location ZIP

ZIP code 70404 serves the downtown Hammond post office in Tangipahoa Parish, Louisiana. This isn't a residential ZIP. It's a point-location designation for the post office building itself, which sits within the larger 70401 ZIP code. All 796 PO Boxes at this location are served under 70404, while Hammond residents receive street delivery through 70401.

Commercial Mail Hub

The only street address in this ZIP is NW Railroad Avenue, the post office's physical location. With 396 business delivery points and 125 ZIP+4 street records, this ZIP handles commercial mail for downtown Hammond businesses. The address records all include UNIT designators, typical for a multi-tenant commercial building or mail center.

Context Within Hammond

Hammond is a college town, home to Southeastern Louisiana University, though the university uses the 70402 ZIP code. The 70404 ZIP exists specifically to manage PO Box services separate from carrier route delivery. Residents who prefer PO Boxes over home delivery rent boxes here, as do businesses needing a downtown mailing address.

Street Name Patterns

Single Location Post Office Address

Only one street exists in this ZIP: the post office address on Railroad Avenue.

Nearby Areas

River Forest Barkley Park

Business & Employment Statistics

ZIP Code 70404 supports both business and residential activity. According to the Business Census (2024), there are 24 business establishments, employing about 150 people with an annual payroll of $10,702,000.

# Residential Mailboxes:	0Source: USPS
# Business Mailboxes:	0Source: USPS
Total Delivery Receptacles:	3,845Source: USPS
Single Family Delivery Units:	0Source: USPS
Multi Family Delivery Units:	0Source: USPS

# of Businesses:	24Source: CBP
1st Quarter Payroll:	$2,724,000Source: CBP
Annual Payroll:	$10,702,000Source: CBP
# of Employees:	150Source: CBP

Geography, Land Area, & Statistical Classifications

ZIP Code 70404 is located in Tangipahoa Parish, Louisiana, within the Hammond, LA Metropolitan Statistical Area (CBSA 25220) and Louisiana's 5th Congressional District. This Metro area has a population of 135,218 people, about 0.00% of whom live in ZIP Code 70404. It covers 0 sq mi of land and a water area of 0 sq mi.

CBSA Name:	Hammond, LASource: Census
CBSA Number:	25220Source: Census
CBSA Type:	MetroSource: Census
CBSA Division:	--Source: Census
CBSA Population:	135,218Source: Census
MSA:	Source: Census
Land Area:	--Source: Census
Water Area:	--Source: Census

Congressional District:	05Source: USPS
Congressional Land Area:	14452.88 sq miSource: Census
PMSA:	Source: Census
Intro Date:	< 2004-10Source: ZIP-Codes.com
Place FIPS Code:	2232755Source: Census
Place Name:	Hammond city; LouisianaSource: Census

Adjacent & Nearby ZIP Codes

70401: Hammond, LA
70403: Hammond, LA
70451: PO BOX
70466: Tickfaw, LA
70711: Albany, LA
70455: Robert, LA
70454: Ponchatoula, LA
70443: Independence, LA
70446: Loranger, LA
70462: Springfield, LA
70744: Holden, LA
70421: Akers, LA
70442: Husser, LA
70422: Amite, LA
70447: Madisonville, LA
70437: Folsom, LA
70754: Livingston, LA
70433: Covington, LA
70456: Roseland, LA
70449: Maurepas, LA

70420 | | 70403

Schools in ZIP Code 70404

We could not locate which school district 70404 belongs to, but we will update this once new district data is released. There are no public schools nor private schools with a mailing address in this ZIP Code. Listing Nearby schools instead. It also has 6 colleges, universities or post secondary education institutions nearby which would be a short commute to.

Greenville Park Leadership Academy 111 Jw Davis Drive
Hammond, LA 70401