Cos Cob is a CDP located in Connecticut. Cos Cob has a 2024 population of 7,322. Cos Cob is currently growing at a rate of 0.55% annually and its population has increased by 3.64% 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.
According to the most recent ACS, the racial composition of Cos Cob was:
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% |
White
Two or more races
Other race
Asian
Black or African American
Native American
Native Hawaiian or Pacific Islander
Household Type | Count | Average Size | Owner | Renter |
|---|---|---|---|---|
| All | 2,635 | 2.78 | 65.4 | 34.6 |
| Married | 1,776 | 3.23 | 69.8 | 30.2 |
| Non Family | 585 | 1.1 | 68.5 | 31.5 |
| Female | 199 | 3.54 | 25.1 | 74.9 |
| Male | 75 | 3.37 | 44 | 56 |
3.19
Average Family Size
2.78
Average Household Size
65.4%
Rate of Home Ownership
Married
Male
Female
NonFamily
owner
renter
Male
Female
Education Attained | Count | Percentage |
|---|---|---|
| 9th to 12th Grade | 132 | 2.77% |
| Associates Degree | 242 | 5.07% |
| Bachelors Degree | 1,592 | 33.36% |
| Graduate Degree | 1,763 | 36.94% |
| High School Graduate | 717 | 15.03% |
| Less Than 9th Grade | 52 | 1.09% |
| Some College | 274 | 5.74% |
Less Than 9th Grade
9th to 12th Grade
High School Graduate
Some College
Associates Degree
Bachelors Degree
Graduate Degree
High School Graduation Rate
Bachelors Rate
Race | Total | High School | Bachelors |
|---|---|---|---|
| White | 3,446 | 3,426 | 2,693 |
| 2+ Races | 484 | 365 | 129 |
| Hispanic | 461 | 396 | 188 |
| Asian | 290 | 290 | 269 |
| Other Race | 220 | 175 | 91 |
| Black | 135 | 135 | 74 |
| Native American | 26 | 26 | 6 |
The highest rate of high school graduation is among black people with a rate of 100%.
The highest rate of bachelors degrees is among asian people with a rate of 92.76%.
All
Male
Female
Name | Average | Male | Female |
|---|---|---|---|
| Bachelors Degree | $148,221 | $162,411 | $110,048 |
| Graduate Degree | $145,417 | $180,263 | $104,286 |
| High School Graduate | $36,671 | $0 | $36,688 |
| Less Than 9th Grade | $31,275 | $31,528 | $0 |
| Overall | $96,591 | $130,066 | $74,258 |
| Some College | $69,961 | $72,161 | $0 |
$96,591
Average Earnings
$130,066
Average Male
$74,258
Average Female
Only English
Spanish
Other Indo-European Languages
Asian and Pacific Island Languages
Other Languages
74.99% of Cos Cob residents speak only English, while 25.01% speak other languages. The non-English language spoken by the largest group is Other Indo-European, which is spoken by 13.08% of the population.
rate
Name | Total | In Poverty | Poverty Rate |
|---|---|---|---|
| White | 4,941 | 255 | 5.16% |
| Hispanic | 1,042 | 148 | 14.2% |
| Other | 505 | 126 | 24.95% |
| Multiple | 927 | 22 | 2.37% |
5.48%
Overall Poverty Rate
6.19%
Male Poverty Rate
4.81%
Female Poverty Rate
The race most likely to be in poverty in Cos Cob is Other, with 24.95% below the poverty level.
The race least likely to be in poverty in Cos Cob is Multiple, with 2.37% below the poverty level.
The poverty rate among those that worked full-time for the past 12 months was 0.78%. Among those working part-time, it was 13.44%, and for those that did not work, the poverty rate was 8.03%.
rate
Rate | Poverty |
|---|---|
| Less Than 9th Grade | 12.5% |
| Bachelors or Greater | 4.14% |
| Some College | 1.16% |
| High School | 0.84% |
rate
Rate | Poverty |
|---|---|
| Male Unemployed | 14.29% |
| Male Employed | 5.57% |
| Female Unemployed | 3.39% |
| Female Employed | 2.88% |
Households
Families
MarriedFamilies
NonFamilies
Name | Median | Mean |
|---|---|---|
| Families | $219,024 | $313,741 |
| Households | $176,602 | $275,854 |
| Married Families | $250,001 | $-999,999,999 |
| Non Families | $92,406 | $130,014 |
mean
median
Married
Widowed
Divorced
Separated
NeverMarried
61.9%
Overall Marriage Rate
66.4%
Male Marriage Rate
57.8%
Female Marriage Rate
male
female
The age group where males are most likely to be married is 45-54, while the female age group most likely to be married is 35-44.
Married
Widowed
Divorced
Separated
NeverMarried
Second Gulf War
First Gulf War
Vietnam
Korea
World War II
152
Number of Veterans
140
Male Veterans
12
Female Veterans
War | Veterans |
|---|---|
| Vietnam | 111 |
| First Gulf War | 8 |
| Second Gulf War | 4 |
| Korea | 0 |
| World War II | 0 |
count
Age Group | Veterans |
|---|---|
| 65 to 74 | 77 |
| 75+ | 60 |
| 55 to 64 | 11 |
| 18 to 34 | 4 |
| 35 to 54 | 0 |
count
Name | Veterans | % of Total |
|---|---|---|
| White | 152 | 3.83% |
Less Than 9th Grade
High School Graduate
Some College
Bachelors or Greater
1.97%
Veteran Poverty Rate
18.42%
Veteran Disability Rate
LaborForceParticipation
72.3%
Labor Force Participation
67.9%
Employment Rate
6.1%
Unemployment Rate
LaborForceParticipation
LaborForceParticipation
Europe
Asia
Africa
Oceania
Latin America
North America
Non citizens include legal permanent residents (green card holders), international students, temporary workers, humanitarian migrants, and illegal immigrants.
Europe
Asia
Africa
Oceania
Latin America
North America
34.43%
Born in Cos Cob
74.84%
Native Born
25.16%
Foreign Born
11.93%
Non Citizen
13.23%
Naturalized
74.84% of Cos Cob residents were born in the United States, with 34.43% having been born in Connecticut. 11.93% of residents are not US citizens. Of those not born in the United States, the largest percentage are from Latin America.
Year | Population | Growth | Change |
|---|---|---|---|
| 2024 | 7,322 | 40 | 0.55% |
| 2023 | 7,282 | 39 | 0.54% |
| 2022 | 7,243 | 154 | 2.17% |
| 2021 | 7,089 | 24 | 0.34% |
| 2020 | 7,065 | 75 | 1.07% |
| 2019 | 6,990 | 31 | 0.45% |
| 2018 | 6,959 | 119 | 1.74% |
| 2017 | 6,840 | 305 | 4.67% |
| 2016 | 6,535 | 102 | 1.59% |
| 2015 | 6,433 | 168 | 2.68% |
| 2014 | 6,265 | -81 | -1.28% |
| 2013 | 6,346 | -259 | -3.92% |
| 2012 | 6,605 | 63 | 0.96% |
| 2011 | 6,542 | -228 | -3.37% |
| 2010 | 6,770 | 0 | 0% |