Postal reference / United States
06340Groton, Connecticut
ZIP code 06340 is a United States postal code for Groton, Connecticut. Its county association is Southeastern Connecticut County. The map reference point is at 41.3572, -72.0579.
- State / territory
- Connecticut
- Recorded place name
- Groton
- County association
- Southeastern Connecticut
- Estimated coordinate
- 41.3572, -72.0579
View on OpenStreetMap - ZIP prefix
- 063 · 40 ZIP codes share it
- Data source
- GeoNames postal reference, snapshot September 26, 2026
GeoNames reference data. County associations may not include every intersecting county, place names are postal names rather than legal boundaries, and coordinates are approximate. This is not address validation.
Area
- Land area
- 22.54 sq mi (2023 Census Gazetteer)
Figures are for the ZIP Code Tabulation Area (ZCTA) that most closely matches this ZIP code, not an exact match to USPS delivery boundaries. Source: U.S. Census Bureau, 2023 Gazetteer + 2023 ACS 5-Year Estimates, retrieved 2026-09-27. How to read this data.
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Connecticut directoryOther ZIP codes in Groton, CT
Groton has 2 ZIP codes in the reference dataset.
- 06349Southeastern Connecticut
Nearby ZIP code reference points
| ZIP code | Place | State | County association | Miles |
|---|---|---|---|---|
| 06320 | New London | CT | Southeastern Connecticut | 2.5 |
| 06349 | Groton | CT | Southeastern Connecticut | 3.4 |
| 06355 | Mystic | CT | Southeastern Connecticut | 4.2 |
| 06388 | West Mystic | CT | Southeastern Connecticut | 4.3 |
| 06375 | Quaker Hill | CT | Southeastern Connecticut | 4.4 |
| 06385 | Waterford | CT | Southeastern Connecticut | 4.6 |
| 06335 | Gales Ferry | CT | Southeastern Connecticut | 4.9 |
| 06372 | Old Mystic | CT | Southeastern Connecticut | 6.0 |
Straight-line distance between reference points. Nearby points do not prove that ZIP areas touch.
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