Cos Cob is a CDP located in . Cos Cob has a 2025 population of 7,361. Cos Cob is currently growing at a rate of 0.53% annually and its population has increased by 4.19% since the most recent census, which recorded a population of 7,065 in 2020.
The average household income in Cos Cob is $275,854 with a poverty rate of 5.48%. The median age in Cos Cob is 39.3 years: 40 years for males, and 37.6 years for females.
Data after 2023 is projected based on recent change
The racial composition of Cos Cob includes 71.93% White, 6.88% other race, 5.36% Asian, and smaller percentages for Black or African American, Native American, Native Hawaiian or Pacific Islander and multiracial populations.
White
Two or more races
Other race
Asian
Black or African American
Native American
Native Hawaiian or Pacific Islander
Race | Population | Percentage (of total) |
|---|---|---|
| White | 5,290 | 71.93% |
| Two or more races | 927 | 12.61% |
| Other race | 506 | 6.88% |
| Asian | 394 | 5.36% |
| Black or African American | 211 | 2.87% |
| Native American | 26 | 0.35% |
| Native Hawaiian or Pacific Islander | 0 | 0% |
Married
Widowed
Divorced
Separated
Never Married
Cos Cob's average per capita income is $96,591. Household income levels show a median of $176,602. The poverty rate stands at 5.48%.
Name | Median | Mean |
|---|---|---|
| Married Families | $250,001 | - |
| Families | $219,024 | $313,741 |
| Households | $176,602 | $275,854 |
| Non Families | $92,406 | $130,014 |
Average Income
Median Household Income
Poverty Rate