There are 16 zip codes in Lassen County, California. The most populated is 96130, located in Susanville. * 2024 populations estimated based on the latest ACS 5-year data.

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Zip Code
Population
City
9613021,460Susanville
961372,949Westwood
961142,927Janesville
961132,164Herlong
960561,318Mcarthur
961091,297Doyle
96128600Standish
96006587Adin
96117288Litchfield
96009247Bieber
96121145Milford
96068125Nubieber
9612362Ravendale
9613640Wendel
9611931Madeline
9613217Termo

Zip Codes in Lassen County, California by Population (2024)