ZIP code · Groton · Connecticut · United States
ZIP code 06340 — Groton
ZIP code 06340 serves Groton, Connecticut.
- Postal code
- 06340Single source Value from one source, not cross-checked.
- City
- Groton
- County
- Southeastern Connecticut FIPS 09011
- State
- Connecticut
- Country
- United States
- Coordinates
- 41.3572, -72.0579 — precision precise (locality)
View on OpenStreetMap - Population
- 29,833 (ZCTA, ACS 5-year)
- Population density
- 1,324 / sq mi
- Land area
- 22.5 sq mi (58.4 km²) (ZCTA, ACS 5-year)
- Median household income
- $77,768
- Per-capita income
- $45,083
- Median age
- 33.2
- Households
- 12,946
- Housing units
- 14,441
- Median home value
- $275,500
- Median gross rent
- $1,492 / month
- Congressional district
- CT-2 (119th Congress)
- USDA hardiness zone
- 7a (0 to 5 °F)Planting / growing zone from the 2023 USDA Plant Hardiness Zone Map: average annual extreme minimum temperature, 1991–2020.
- Time zone
- America/New_York (UTC−5 / UTC−4 DST)
Tools: compare 06340 with another ZIP · ZIPs within 25 miles · distance from 06340
Map of ZIP code 06340
Climate — monthly normals
Warmest month Jul (avg high 81°F), coldest Jan (avg low 24°F).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 39 | 41 | 47 | 57 | 66 | 75 | 81 | 80 | 74 | 63 | 53 | 44 |
| Avg low °F | 24 | 25 | 32 | 41 | 50 | 59 | 66 | 65 | 58 | 47 | 38 | 30 |
| Precip in | 3.9 | 3.4 | 4.9 | 4.4 | 3.7 | 3.9 | 3.4 | 4.2 | 4.3 | 4.4 | 3.8 | 4.6 |
NOAA 1991–2020 climate normals from the nearest station: GROTON (1.1 mi) · NOAA NCEI
Places in ZIP 06340
- 11 schools
- 1 colleges & universities
- 4 hospitals & clinics
- 5 doctors & dentists
- 2 pharmacies
- 4 supermarkets
- 60 restaurants & cafés
- 2 bars & pubs
- 34 parks
- 31 playgrounds
- 10 gyms & sports centres
- 4 libraries
- 5 post offices
- 15 places of worship
- 11 banks
- 15 gas stations
- 13 police & fire stations
Places mapped inside this ZIP’s ZCTA area in OpenStreetMap. OSM is community-maintained: counts reflect what has been mapped, and completeness varies by area — treat them as at-least figures. © OpenStreetMap contributors (ODbL) · Methodology
About this page
US ZIP codes have five digits. They are postal routing areas, not administrative boundaries: a ZIP can span more than one city or county, and the city shown is the primary USPS name for that code.
GeoNames · U.S. Census Bureau (ACS) · U.S. Census Bureau · NOAA NCEI · usda-phzm. Data generated on 2026-08-21. Methodology · Report an error on this page