There are 18 zip codes in Waldo County, Maine. The most populated is 4915, located in Belfast. * 2024 populations estimated based on the latest ACS 5-year data.

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Zip Code
City
Population
04915Belfast9,078
04496Winterport3,837
04849Lincolnville3,808
04974Searsport2,649
04981Stockton Springs2,479
04986Thorndike2,382
04988Unity1,988
04941Freedom1,736
04952Morrill1,730
04921Brooks1,586
04354Palermo1,447
04973Searsmont1,415
04438Frankfort1,323
04951Monroe1,079
04987Troy962
04949Liberty884
04922Burnham829
04848Islesboro617

Waldo County, Maine Zip Codes by Population (2024)