Old Greenwich, CT ZIP codes

2 ZIP/ZCTAs intersecting this Census place (CDP) in Fairfield County.

ACS 2023 population

6,904

Median household income

$250,000+

Median home value

$1,668,200

U.S. Census Bureau, ACS 2019–2023 5-year (vintage 2023). Geography: Census place Old Greenwich (GEOID 0956900). Methodology

Combined population of ZIP/ZCTAs intersecting this place: 16,349 (2 ZIPs).

Combined population of ZIP/ZCTAs intersecting this place. Each intersecting ZIP contributes its full ZCTA population; overlap percents are descriptive only. This is not the Census place ACS headline above. Methodology

Map of Old Greenwich, CT

Census place boundary and intersecting ZIP Code Tabulation Areas for Old Greenwich, CT — Census place boundary for Old Greenwich, CT. Intersecting ZCTAs may extend past the city limit. Not a USPS city limit. Boundaries: U.S. Census Bureau. Methodology · Data sources

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ZIP/ZCTA overlap with Old Greenwich

Population overlap

Share of each ZIP/ZCTA’s population located within Old Greenwich, based on ZIP Code Database place-overlap data. This is a population measure, not land-area overlap or the Census-place population.

0687089.2%
USPS primary city
068780.5%

ZIP Code Database place-overlap table, field percent_of_zip_population_in_place, keyed by place_geoid. Not ACS 2019–2023. Overlap vintage is the shipped overlap table and is separate from ACS. Methodology

ZIP codes intersecting Old Greenwich

ZIP	City	County	Population	Income
06870	Old Greenwich	Fairfield County	7,903	$227,727
06878	Riverside	Fairfield County	8,446	$250,000+