There are 18 zip codes in Cache County, Utah. The most populated is 84321, located in Logan. * 2024 populations estimated based on the latest ACS 5-year data.

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Zip Code
Population
City
8432149,434Logan
8434125,062Logan
8433515,787Smithfield
843199,994Hyrum
843328,418Providence
843395,915Wellsville
843185,298Hyde Park
843333,084Richmond
843202,746Lewiston
843252,263Mendon
843262,072Millville
843281,718Paradise
843271,041Newton
84305659Clarkston
84338567Trenton
84308265Cornish
84304105Cache Junction
843220Logan

Zip Codes in Cache County, Utah by Population (2024)