U.S. postal lookup

U.S. ZIP Codes Database 2026

Name: Richland Parish
Address: US

Search by ZIP code, city, county, or state and find clear postal details with maps, time zones, and area code data.

42,735 verified records

All states and U.S. territories

Maps and coordinates

County directory

Richland Parish ZIP Codes

Browse all ZIP Codes, cities, and associated area codes registered in Richland Parish.

County	State	ZIP Code	City	Area Codes
Richland Parish	LA	71218	Archibald	`318`
Richland Parish	LA	71232	Delhi	`318`
Richland Parish	LA	71259	Mangham	`318`
Richland Parish	LA	71264	Oak Ridge	`318`
Richland Parish	LA	71269	Rayville	`318`
Richland Parish	LA	71279	Start	`318`

Geographic Map of Richland Parish

Postal context

About U.S. ZIP Codes

ZIP codes are a United States Postal Service system introduced in 1963 to make mail routing more accurate and efficient. The standard format uses five digits, while ZIP+4 adds four more digits for a more precise delivery segment.

ZIP codes cover the United States, its territories, military mail routes, and other USPS delivery points. This directory organizes that data for practical lookup by ZIP code, city, county, and state.