ZIP Code 06870 – Old Greenwich, CT
Old Greenwich, Connecticut · Western Connecticut Planning Region · Eastern time
| ZIP code | 06870 |
|---|---|
| City | Old Greenwich |
| State | Connecticut |
| County | Western Connecticut Planning Region |
| Population | 7,864 |
| Time zone | Eastern · local time |
| ZIP type | Standard (has a Census ZCTA area) |
| Land area | 2.27 sq mi |
| Center (lat, long) | 41.0244, -73.5712 |
Area codes in this area
These are the area codes that most often serve ZIP 06870 (including overlays). The exact area code depends on the phone number — landlines, mobiles and overlays can differ even on the same street.
Map
Nearby ZIP codes
About ZIP 06870
ZIP code 06870 is assigned to Old Greenwich, Connecticut. It lies in Western Connecticut Planning Region. Its Census area covers about 2.27 square miles of land. The closest neighboring ZIP is 06878 (Riverside), about 0.8 miles away.
Every address in 06870 also has a 4-digit add-on code (ZIP+4) that points to a smaller delivery area. Use the box above to find it.
Sources: US Census Bureau (ZCTA, county relationship files), GeoNames (CC BY 4.0), NANPA via NumberResearch.org (CC BY 4.0). Map © OpenStreetMap contributors. ZIP areas are approximate. Population: U.S. Census Bureau, ACS 5-year estimates, 2024 (ZCTA). Data sources