Cos Cob Cdp, Connecticut Census 2020 Voting-age Population By Race and Ethnicity

Updated on February 22, 2026.

According to the data from the US 2020 decennial Census, in April 2020, the 5.13K voting-age population of Cos Cob Cdp, CT residents comprised of 494 residents who identified as Hispanic or Latino (9.63%), and 4.64K residents who identified as Non-Hispanic (90.37%).

Race: The White Alone voting-age population was the largest racial group in Cos Cob Cdp, CT, with a voting-age population of 4.07K (79.33%). The Two Or More Races voting-age population was the second largest racial group in Cos Cob Cdp, CT, with a voting-age population of 434 (8.46%). The Asian Alone voting-age population was the third largest racial group in Cos Cob Cdp, CT, with a voting-age population of 403 (7.85%). The smallest racial group in Cos Cob Cdp, CT was Native Hawaiian And Pacific Islander Alone with a voting-age population of 0 (0.00%).

Ethnicity: The Non-Hispanic - White Alone voting-age population was the largest ethnic group in Cos Cob Cdp, CT, with a voting-age population of 3.98K (77.46%). The Non-Hispanic - Asian Alone voting-age population was the second largest ethnic group in Cos Cob Cdp, CT, with a voting-age population of 401 (7.81%). The Hispanic - Two or More Races voting-age population was the third largest ethnic group in Cos Cob Cdp, CT, with a voting-age population of 261 (5.09%). The smallest ethnic group in Cos Cob Cdp, CT was Hispanic - Native Hawaiian & Pac. Islander with a voting-age population of 0 (0.00%).

The charts and tables below shows the voting-age population and percentage of each racial group and ethnicity group in Cos Cob Cdp, Connecticut from the 2020 decennial census.

You can see similar information for other cities and places in Connecticut and also for the state of Connecticut.

Cos Cob Cdp, CT Voting-age Hispanics and Non Hispanics Population in Census 2020
Total Voting-age Population:
Cos Cob Cdp, CT Voting-age Racial Groups in Census 2020
Total Voting-age Population:
Cos Cob Cdp, CT Voting-age Ethnicity Groups in Census 2020
Total Voting-age Population:
Cos Cob Cdp, CT Voting-age Population of Racial Groups in Census 2020
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Race Voting-age Population % of City or Place Voting-age Population
Black or African American Alone 51 0.99
White Alone 4071 79.33
American Indian and Alaska Native Alone 7 0.14
Asian Alone 403 7.85
Native Hawaiian And Pacific Islander Alone 0 0.00
Some Other Race Alone 166 3.24
Two Or More Races 434 8.46
Cos Cob Cdp, CT Voting-age Population of Ethnicity Groups in Census 2020
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Ethnicity Voting-age Population % of City or Place Voting-age Population
Non-Hispanic - White Alone 3975 77.46
Non-Hispanic - Asian Alone 401 7.81
Hispanic - Two or More Races 261 5.09
Non-Hispanic - Two or More Races 173 3.37
Hispanic - Some Other Race Alone 130 2.53
Hispanic - White Alone 96 1.87
Non-Hispanic - Black Alone 50 0.97
Non-Hispanic - Some Other Race Alone 36 0.70
Hispanic - American Indian & Alaska Native 4 0.08
Non-Hispanic - American Indian & Alaska Native 3 0.06
Hispanic - Asian Alone 2 0.04
Hispanic - Black Alone 1 0.02
Non-Hispanic - Native Hawaiian & Pac. Islander 0 0.00
Hispanic - Native Hawaiian & Pac. Islander 0 0.00