New London County, Connecticut ZIP codes
33 ZIP codes are in New London County, plus 1 that cross in from neighboring counties. It's part of the Norwich-New London-Willimantic, CT metro area.
- ZIP codes
- 33
- Population in these ZIPs
- 269,636
- Avg. median income
- $95,100population-weighted
- Cities & towns
- 33
Click anywhere on the map to see which ZIP code it's in.
ZIP codes in New London County
| ZIP code | City | Population | Median income | Typical home value |
|---|---|---|---|---|
| 06249 | Lebanon | 7,116 | $109,135 | $425,700 |
| 06254 | North Franklin | 2,004 | $105,000 | $419,200 |
| 06320 | New London | 27,703 | $59,170 | $327,600 |
| 06330 | Baltic | 3,327 | $98,698 | $373,400 |
| 06333 | East Lyme | 7,389 | $129,083 | $554,500 |
| 06334 | Bozrah | 2,249 | $107,969 | $405,200 |
| 06335 | Gales Ferry | 6,307 | $118,116 | $419,100 |
| 06336 | Gilman | 44 | $133,750 | — |
| 06338 | Mashantucket | 27 | $137,500 | $433,300 |
| 06339 | Ledyard | 9,113 | $106,403 | $414,000 |
| 06340 | Groton | 29,863 | $81,792 | $386,400 |
| 06350 | Hanover | 121 | $40,950 | — |
| 06351 | Jewett City | 15,760 | $82,976 | $371,700 |
| 06353 | Montville | 439 | — | — |
| 06355 | Mystic | 12,173 | $137,425 | $607,500 |
| 06357 | Niantic | 11,332 | $93,026 | $524,700 |
| 06359 | North Stonington | 5,160 | $123,938 | $471,500 |
| 06360 | Norwich | 37,216 | $65,539 | $305,900 |
| 06365 | Preston | 4,807 | $117,045 | $424,400 |
| 06370 | Oakdale | 7,327 | $105,700 | $400,900 |
| 06371 | Old Lyme | 9,828 | $132,045 | $695,900 |
| 06375 | Quaker Hill | 3,670 | $111,833 | $401,800 |
| 06376 | South Lyme | 89 | $156,000 | $444,400 |
| 06378 | Stonington | 5,555 | $135,714 | $797,600 |
| 06379 | Pawcatuck | 9,017 | $95,066 | $490,100 |
| 06380 | Taftville | 2,757 | $63,452 | $297,000 |
| 06382 | Uncasville | 10,143 | $89,635 | $347,200 |
| 06384 | Voluntown | 2,663 | $106,518 | $448,700 |
| 06385 | Waterford | 15,966 | $100,484 | $439,900 |
| 06389 | Yantic | 0 | — | — |
| 06415 | Colchester | 16,038 | $123,256 | $444,900 |
| 06420 | Salem | 4,368 | $123,425 | $476,800 |
| 06439 | Hadlyme | 65 | $187,083 | $662,500 |
ZIP codes partly in New London County
These ZIP codes are mostly in a neighboring county but cover part of New London County.
| ZIP code | City | County | Population | Median income | Typical home value |
|---|---|---|---|---|---|
| 06331 | Canterbury | Windham County | 5,145 | $103,198 | $415,000 |
Population and median household income: ACS 2020–2024 5-year estimates. Typical home value: Zillow Home Value Index (September 2026) where available, otherwise the ACS median owner-reported value. "PO Box" marks ZIP codes with no delivery area of their own. Methodology
Cities and towns in New London County
Nearby counties
Frequently asked questions
How many ZIP codes are in New London County, Connecticut?
33 ZIP codes are mainly in New London County, and 1 more ZIP codes from neighboring areas reach partly into it.
What cities are in New London County?
ZIP codes in New London County use the city names Baltic, Bozrah, Colchester, East Lyme, Gales Ferry, Gilman, Groton, Hadlyme, Hanover, Jewett City, Lebanon and Ledyard and others.
What metro area is New London County in?
New London County is part of the Norwich-New London-Willimantic, CT metropolitan statistical area.