63
- 06320 New London
- 06330 Baltic
- 06331 Canterbury
- 06332 Central Village
- 06333 East Lyme
- 06334 Bozrah
- 06335 Gales Ferry
- 06336 Gilman
- 06339 Ledyard
- 06340 Groton
- 06350 Hanover
- 06351 Jewett City
- 06353 Montville
- 06354 Moosup
- 06355 Mystic
- 06357 Niantic
- 06359 North Stonington
- 06360 Norwich
- 06365 Preston
- 06370 Oakdale
- 06371 Old Lyme
- 06373 Oneco
- 06374 Plainfield
- 06375 Quaker Hill
- 06376 South Lyme
- 06377 Sterling
- 06378 Stonington
- 06379 Pawcatuck
- 06380 Taftville
- 06382 Uncasville
- 06384 Voluntown
- 06385 Waterford
- 06387 Wauregan
- 06389 Yantic
- 06390 Fishers Island