Cos Cob demographics profile

StatisticCos CobConnecticutNational
Population density (sq mi)3,14764891
Median age43.440.637.7
Male/Female ratio1.0:11.0:11.0:1
Married (15yrs & older)63%54%55%
Families w/ Kids under 1848%43%43%
Speak English71%78%79%
Speak Spanish10%12%13%
Cos Cob, CT has a population of 6,535 and is the 5,438th largest city in the United States. The population density is 3,147 per sq mi which is 386% higher than the Connecticut average and 3374% higher than the national average. The median age in Cos Cob is 43 which is approximately 7% higher than the Connecticut average of 41. In Cos Cob, 63% of the population over 15 years of age are married, 71% speak English and 10% speak Spanish. 35% of Cos Cob residents were born in Connecticut, 37% were born out of state, 2% were born outside of the United States and 25% were foreign born.
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Did you know?

  • The population density in Cos Cob is 386% higher than Connecticut.
  • The median age in Cos Cob is 7% higher than Connecticut.
  • In Cos Cob 82.60% of the population is White.
  • In Cos Cob 1.38% of the population is Black or African American.
  • In Cos Cob 11.22% of the population is Asian.

Compare Cos Cob, CT Demographics To Other Cities

Cos Cob population breakdown by race

RaceCos CobConnecticutNational
Black or African American1.38%10.39%12.63%
American Indian0.14%0.26%0.82%
Native Hawaiian0.00%0.03%0.18%
Mixed race2.97%2.98%3.06%
Other race1.70%4.95%4.75%
In Cos Cob, 9.8% of people are of Hispanic or Latino origin.
Please note: Hispanics may be of any race, so also are included in any/all of the applicable race categories above.

Languages spoken

Place of birth by citizenship

Household income distribution

Source of income

Cos Cob age breakdown

Marital status

Age of children in married couples

Source: The Cos Cob, CT demographics data displayed above is derived from the 2016 United States Census Bureau American Community Survey (ACS).
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