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 and multiracial populations.
White (71.9%)
Two or more races (12.6%)
Other race (6.9%)
Asian (5.4%)
Black or African American (2.9%)
Native American (0.4%)
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% |
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