Old Greenwich, CT Profile: Facts, Map & Data


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Old Greenwich, Connecticut - Basic Facts

The Old Greenwich Census Designated Place had a population of 6,829 as of July 1, 2017. Old Greenwich ranks in the upper quartile for Population Density when compared to the other cities, towns and Census Designated Places (CDPs) in Connecticut. See peer rankings below.

The primary coordinate point for Old Greenwich is located at latitude 41.0201 and longitude -73.5677 in Fairfield County. The formal boundaries for the Old Greenwich Census Designated Place (see map below) encompass a land area of 2 sq. miles and a water area of 1.48 sq. miles. Fairfield County is in the Eastern time zone (GMT -5). The elevation is 20 feet.

The Old Greenwich Census Designated Place (GNIS ID: 2631571) has a U1 Census Class Code which indicates a census designated place with an official federally recognized name. It also has a Functional Status Code of "S" which identifies a statistical entity.

The Old Greenwich Census Designated Place is located within Town of Greenwich, a minor civil division (MCD) of Fairfield County.

Beneath the boundary map are tables with Old Greenwich population, income and housing data, five-year growth projections and peer comparisons for key demographic data. The estimates are for July 1, 2017.

Alternate Unofficial Names for Old Greenwich: Greenwich Old Town, Monakeway, SoundBeach.

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Old Greenwich Census Designated Place, CT Boundary Map

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Old Greenwich, CT Data & Demographics (As of July 1, 2017)


Total Population 6,829
Daytime Population: Workers 3,879
Daytime Population: Residents 3,804
Total Daytime Population (TDP) 7,683
Ratio TDP/Total Population1 1.13
Population in Households 6,818
Population in Familes 6,193
Population in Group Qrtrs 11
Population Density2 3,422
Diversity Index3 33


Median Household Income $200,001
Average Household Income $285,793
Per Capita Income $96,046


Total Housing Units 2,475 (100%)
Owner Occupied HU 1,845 (74.5%)
Renter Occupied HU 449 (18.1%)
Vacant Housing Units 181 ( 7.3%)
Median Home Value $1,000,001
Average Home Value $1,060,217


Total Households 2,294
Average Household Size 2.97
Family Households 1,819
Average Family Size 3
  1. If the ratio of the TDP to Total Population is greater than 1, the location gains population during the day when commuting workers are present. If the ratio is less than 1, the location is more of a bedroom community where people commute to another place for work.
  2. Population Density = Total Population per square mile.
  3. The Diversity Index is a scale of 0 to 100 that represents the likelihood that two persons, chosen at random from the same area, belong to different race or ethnic groups. If an area's entire population belongs to one race AND one ethnic group, then the area has zero diversity. An area's diversity index increases to 100 when the population is evenly divided into two or more race/ethnic groups.


2010-2017 2017-2022
Population 0.45% 0.48%
Households 0.2% 0.35%
Families 0.18% 0.34%
Median Household Income   0.0%
Per Capita Income   1.43%

Old Greenwich, CT - Peer Comparisons by Rank and Percentile

The table below compares Old Greenwich to the other 142 incorporated cities, towns and CDPs in Connecticut by rank and percentile using July 1, 2017 data. The location Ranked # 1 has the highest value. A location that ranks higher than 75% of its peers would be in the 75th percentile of the peer group.

Variable Description Rank Percentile
Total Population # 52 64th
Population Density # 21 86th
Diversity Index # 65 54th
Median Household Income # 2 100th
Per Capita Income # 1 100th

Additional comparisons and rankings can be made with a VERY EASY TO USE Connecticut Census Data Comparison Tool.

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