There are 4 zip codes in Washington Parish, Louisiana. The most populated is 70438, located in Franklinton. * 2024 populations estimated based on the latest ACS 5-year data.

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Zip Code
City
Population
70438Franklinton20,345
70427Bogalusa17,894
70426Angie5,912
70450Mount Hermon2,332

Washington Parish, Louisiana Zip Codes by Population (2024)