Cos Cob is a city located in Fairfield County Connecticut. Cos Cob has a 2020 population of 6,990. Cos Cob is currently declining at a rate of 0.00% annually and its population has increased by 3.25% since the most recent census, which recorded a population of 6,770 in 2010. Cos Cob reached it's highest population of 6,990 in 2019.
The average household income in Cos Cob is $214,384 with a poverty rate of 6.54%. The median rental costs in recent years comes to $1,979 per month, and the median house value is $1.06 Mn. The median age in Cos Cob is 42.8 years, 40.3 years for males, and 45 years for females.