Every ZIP code in the United States, with weather, radar, trivia and the numbers behind it. Five digits since 1963!

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zipcodes.pro — CITY/CT/OLD-GREENWICH

Old Greenwich ZIP code, Connecticut

The ZIP code for Old Greenwich, CT is 06870, and its area codes are 203 and 475.

USPS city name
1 ZIP code
Overlapping the city
2 more
Population
6,936
Area codes
203, 475

Mail addressed to Old Greenwich uses the ZIP code above. 2 more ZIP codes cover part of the city but are addressed as somewhere else; they are listed separately below.

Old Greenwich in numbers

About 6,936 people live in Old Greenwich, in 2,385 households. The median household income is $250,000+ a year (US: $80,734). The median owner-occupied home is valued at $1,844,700 (5.0 times the Connecticut median), and median gross rent is $3,500+ a month. The median age is 40.5; 85.4% of adults 25 and over hold a bachelor's degree or higher (42.5% across Connecticut); the average commute takes 35 minutes.

Population6,936Old Greenwich6,936
Households2,385Old Greenwich2,385
Median age40.5Old Greenwich40.5Connecticut41.1US 38.9
Median household income$250,000+Old Greenwich$250,000+Connecticut$95,781US $80,734
Median home value$1,844,700Old Greenwich$1,844,700Connecticut$366,900US $332,700
Median gross rent$3,500+Old Greenwich$3,500+Connecticut$1,488US $1,413
Bachelor's degree or higher85.4%Old Greenwich85.4%Connecticut42.5%US 35.7%
Mean commute34.7 minOld Greenwich34.7 minConnecticut26.5 minUS 26.4 min
Population density3,477 / sq miOld Greenwich3,477 / sq mi

U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates, for the census place Old Greenwich CDP. Survey estimates carry margins of error, wider for small places. Sources and methods.

ZIP codes addressed as Old Greenwich

ZIP codes with the USPS city name Old Greenwich
ZIP City Type Population Median income Median home
06870 Old Greenwich , CT Standard 7,864 $250,000+ $1,788,700

Other ZIP codes overlapping Old Greenwich

These ZIP codes cover part of Old Greenwich but are addressed as somewhere else.

ZIP codes overlapping Old Greenwich
ZIP City Type Population Median income Median home
06878 Riverside , CT Standard 8,328 $250,000+ $1,968,800
06902 Stamford , CT Standard 73,392 $94,843 $510,400

Map of Old Greenwich ZIP codes

06870

The ZIP codes of Old Greenwich, CT, shaded. Outlines are Census ZIP Code Tabulation Areas (2020), which approximate the mail routes; PO-box and single-address codes have no area and are not drawn. Click any area to open its ZIP code.

Towns near Old Greenwich

The nearest larger towns are Riverside (8,954 people, 1.1 mi), Cos Cob (7,546 people, 2.3 mi) and Greenwich (14,792 people, 3.1 mi).

Towns near Old Greenwich
TownPopulationDistance
Riverside 8,954 1.1 mi
Cos Cob 7,546 2.3 mi
Greenwich 14,792 3.1 mi
Stamford 137,144 4.3 mi
Pemberwick 3,665 4.6 mi
Byram 4,633 4.7 mi
Noroton 5,539 4.8 mi
Glenville 2,656 5.1 mi
Noroton Heights 2,782 5.2 mi
Port Chester, NY 31,102 5.3 mi
Tokeneke 2,951 5.9 mi
Rye Brook, NY 9,900 6.2 mi
Bayville, NY 6,744 7.8 mi
Harrison, NY 29,961 7.9 mi

More nearby: every ZIP code in Fairfield County · Connecticut ZIP codes

Cite this page

zipcodes.pro. “Old Greenwich, CT ZIP codes.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/city/ct/old-greenwich

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