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
Population
City
049159,078Belfast
044963,837Winterport
048493,808Lincolnville
049742,649Searsport
049812,479Stockton Springs
049862,382Thorndike
049881,988Unity
049411,736Freedom
049521,730Morrill
049211,586Brooks
043541,447Palermo
049731,415Searsmont
044381,323Frankfort
049511,079Monroe
04987962Troy
04949884Liberty
04922829Burnham
04848617Islesboro

Zip Codes in Waldo County, Maine by Population (2024)