Cos Cob is home to 7,546 people in Connecticut. That is roughly 99% ahead of the Connecticut median. This is an unusually credentialed place: 70% of adults have a four-year degree. The typical home is worth $1,210,400. Median household income runs $190,481, well clear of the $82,259 US median. Renters pay $3,067 a month at the median.
At a glance
Wealthier
median household income $190,481, above the US median
Shares are "alone or in combination": a person with both Medicare and Medicaid counts in each, so categories overlap and do not sum to 100%.
Section 09 · Service history
Veterans
Veterans by period of service, 2024
Gulf War (2001 or later)2.4%(4)
US avg: 26.4%
Gulf War (1990s)0%(0)
US avg: 24.3%
Vietnam era74.4%(122)
US avg: 33.1%
Korean War0%(0)
US avg: 4.5%
World War II0%(0)
US avg: 1%
Share of the 164 veterans here. A veteran who served across eras counts in each, so shares can total more than 100%. Peacetime-only service is included in the total but not shown as an era.
BAR + DOT: THIS PLACE · TICK: US AVERAGE
Over time
Cos Cob, decade by decade
Cos Cob population, inflation-adjusted income and home value, education, and diversity by year
Year
Population
Median household income
Median home value
Bachelor's degree+
Diversity score
2010
6,770
$183,126
$1,394,119
64.7%
43.2
2020
6,873
$165,615
$1,259,187
65.9%
52.1
2024
7,546
$190,481
$1,210,400
70.2%
68.1
Census years come from the decennial census and the latest year from the American Community Survey, so part of any change between those two rows can reflect the different surveys. Dollar figures are adjusted for inflation to 2024 dollars; a figure ending in "+" was at the Census Bureau's reporting cap that year. The diversity score runs from 0 to 100; see how it's calculated.
