ZIP code · Stonington · Connecticut · United States
ZIP code 06378 — Stonington
ZIP code 06378 serves Stonington, Connecticut.
- Postal code
- 06378Single source Value from one source, not cross-checked.
- City
- Stonington
- County
- Southeastern Connecticut FIPS 09011
- State
- Connecticut
- Country
- United States
- Coordinates
- 41.3664, -71.9155 — precision precise (locality)
View on OpenStreetMap - Population
- 5,408 (ZCTA, ACS 5-year)
- Population density
- 259 / sq mi
- Land area
- 20.9 sq mi (54.1 km²) (ZCTA, ACS 5-year)
- Median household income
- $126,014
- Per-capita income
- $87,281
- Median age
- 57.9
- Households
- 2,609
- Housing units
- 3,144
- Median home value
- $576,200
- Median gross rent
- $1,720 / 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 06378 with another ZIP · ZIPs within 25 miles · distance from 06378
Map of ZIP code 06378
Climate — monthly normals
Warmest month Jul (avg high 82°F), coldest Jan (avg low 25°F).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 40 | 41 | 47 | 57 | 67 | 75 | 82 | 81 | 74 | 64 | 54 | 45 |
| Avg low °F | 25 | 26 | 32 | 41 | 50 | 59 | 66 | 64 | 57 | 47 | 38 | 30 |
| Precip in | 3.3 | 2.8 | 4.2 | 3.9 | 3.3 | 3.5 | 2.9 | 3.5 | 3.8 | 4.3 | 3.5 | 3.8 |
NOAA 1991–2020 climate normals from the nearest station: WESTERLY STATE AP (6.2 mi) · NOAA NCEI
Places in ZIP 06378
- 2 schools
- 2 hospitals & clinics
- 3 restaurants & cafés
- 2 parks
- 1 playgrounds
- 2 libraries
- 1 post offices
- 4 places of worship
- 3 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