Cos Cob, CT Profile: Facts & Data


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Cos Cob, Connecticut - Basic Facts

The Cos Cob Census Designated Place had a population of 7,045 as of July 1, 2018. Cos Cob 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 Cos Cob is located at latitude 41.0334 and longitude -73.5996 in Fairfield County. The formal boundaries for the Cos Cob Census Designated Place (see map below) encompass a land area of 2.08 sq. miles and a water area of 0.12 sq. miles. Fairfield County is in the Eastern time zone (GMT -5). The elevation is 52 feet.

The Cos Cob Census Designated Place (GNIS ID: 2631561) 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 Cos Cob Census Designated Place is located within Town of Greenwich, a minor civil division (MCD) of Fairfield County.

Alternate Unofficial Names for Cos Cob: Cos Cob Village, Lower Landing.

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  1. Cos Cob 2018 Demographic Data
  2. Growth Rates for Cos Cob (Historical & 5-Year Forecast)
  3. Peer Comparisons (Rank and Percentile)
  1. Neighborhoods Demographics (Home Values, Household Income, etc.)
  2. Connecticut Research Tools (Easy Tools & Current Data)
  3. Connecticut Data Comparison Tool - 2018 Demographics

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Boundary Maps, Demographic Data, School Zones Review maps and data for the neighborhood, city, county, ZIP Code, and school zone. July 1, 2018, data includes home values, household income, percentage of homes owned, rented or vacant, etc.


Cos Cob, CT Data & Demographics (As of July 1, 2018)


Total Population 7,045
Population in Households 7,018
Population in Familes 6,084
Population in Group Qrtrs 27
Population Density2 3,393
Diversity Index3 45


Median Household Income $154,170
Average Household Income $211,141
Per Capita Income $78,749


Total Housing Units 2,747 (100%)
Owner Occupied HU 1,709 (62.2%)
Renter Occupied HU 903 (32.9%)
Vacant Housing Units 135 ( 4.9%)
Median Home Value $1,021,654
Average Home Value $1,126,360


Total Households 2,612
Average Household Size 2.69
Family Households 1,883
Average Family Size 3
  1. Demographics are point estimates for July 1st of the current year and each for the forecast years. See References for more information.
  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.


2010-2018 2018-2023
Population 0.48% 0.46%
Households 0.33% 0.36%
Families 0.27% 0.36%
Median Household Income   1.28%
Per Capita Income   2.14%

Cos Cob, CT - Peer Comparisons by Rank and Percentile

The table below compares Cos Cob to the other 142 incorporated cities, towns and CDPs in Connecticut by rank and percentile using July 1, 2018 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 # 50 65th
Population Density # 21 86th
Diversity Index # 41 72nd
Median Household Income # 5 97th
Per Capita Income # 10 94th

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

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