There are 33 zip codes in New London County, Connecticut. The most populated is 6360, located in Norwich. * 2024 populations estimated based on the latest ACS 5-year data.

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Zip Code
Population
City
636037,219Norwich
634029,672Groton
632027,600New London
641516,130Colchester
638515,886Waterford
635115,695Jewett City
635512,481Mystic
635711,530Niantic
638210,240Uncasville
63719,972Old Lyme
63399,239Ledyard
63798,973Pawcatuck
63707,839Oakdale
62497,145Lebanon
63337,070East Lyme
63356,199Gales Ferry
63785,488Stonington
63595,160North Stonington
63654,719Preston
64204,307Salem
63753,696Quaker Hill
63303,305Baltic
63802,725Taftville
63842,683Voluntown
63342,343Bozrah
62541,892North Franklin
6389110Yantic
635082Hanover
635375Montville
633667Gilman
637643South Lyme
633841Ledyard
643923Hadlyme
showing: 33 rows

Zip Codes in New London County, Connecticut by Population (2024)