Groton, CT ZIP codes
Groton, Connecticut has 2 ZIP codes, including 1 PO Box ZIP. They are in New London County and Southeastern Connecticut Planning Region.
- Population in these ZIPs
- 29,863
- Avg. median income
- $81,800population-weighted
- Typical home value
- $386,400population-weighted
- Metro area
- Norwich-New London-Willimantic, CT
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Groton, CT ZIP codes list
| ZIP code | County | Population | Median income | Typical home value |
|---|---|---|---|---|
| 06340 | New London County | 29,863 | $81,792 | $386,400 |
| 06349 PO Box | Southeastern Connecticut Planning Region | — | — | — |
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 near Groton
- New London 3 mi
- Quaker Hill 4 mi
- Gales Ferry 4 mi
- Waterford 5 mi
- Mystic 5 mi
- Ledyard 6 mi
- Montville 7 mi
- Uncasville 7 mi
- Mashantucket 8 mi
- Stonington 8 mi
- East Lyme 9 mi
- Oakdale 9 mi
Frequently asked questions
What county is Groton, Connecticut in?
Groton ZIP codes are in New London County and Southeastern Connecticut Planning Region.
Which Groton ZIP codes are PO Boxes?
06349 is a PO Box or single-organization ZIP code; it has no residential delivery area.