Cos Cob, CT Profile: Facts, Map & Data


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Cos Cob, Connecticut - Basic Facts

The Cos Cob Census Designated Place had a population of 7,007 as of July 1, 2015. 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 41.0486 and longitude -73.5919 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.

Beneath the boundary map are tables with Cos Cob population, income and housing data, five-year growth projections and peer comparisons for key demographic data. The estimates are for July 1, 2015.

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

Neighborhood Data

Address Based Hyperlocal Data Input an address and get data & demographics for the pertinent census block group (CBG), a searchable map and a customized directory. The CBG is the smallest geographical unit used by the Census Bureau for reporting certain data.


Cos Cob Census Designated Place, CT Boundary Map

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Boundary Maps: Town of Greenwich | Fairfield County | Connecticut Counties

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Cos Cob, CT Data & Demographics (As of July 1, 2015)


Total Population 7,007
Population in Households 6,979
Population in Familes 6,036
Population in Group Qrtrs 28
Population Density1 3,378
Diversity Index2 42


Total Households 2,630
Average Household Size 2.65
Family Households 1,897
Average Family Size 3


Total Housing Units 2,759 (100%)
Owner Occupied HU 1,746 (63.3%)
Renter Occupied HU 884 (32.0%)
Vacant Housing Units 129 ( 4.7%)
Median Home Value $884,381
Average Home Value $913,553


Median Household Income $139,895
Average Household Income $177,864
Per Capita Income $67,083
  (Compound Annual Growth Rates)


2010-2015 2015-2020
Population 0.66% 0.77%
Households 0.65% 0.77%
Families 0.56% 0.76%
Median Household Income   1.76%
Per Capita Income   2.43%
1) Population Density = Total Population per square mile.
2) The Diversity Index is a scale of 0 to 100 that represents the likelyhood 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.
Based on Census 2010 counts, the Diversity Index for the United States was 60.6 and it is expected to increase to 64.8 by July 1, 2018.


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, 2015 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 # 51 65th
Population Density1 # 20 87th
Diversity Index2 # 42 71st
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.