Old Greenwich is a city located in Fairfield County Connecticut. Old Greenwich has a 2020 population of 6,844. Old Greenwich is currently declining at a rate of 0.00% annually and its population has increased by 3.52% since the most recent census, which recorded a population of 6,611 in 2010. Old Greenwich reached it's highest population of 7,000 in 2016.
The average household income in Old Greenwich is $308,817 with a poverty rate of 3.57%. The median rental costs in recent years comes to $2,127 per month, and the median house value is $1.56 Mn. The median age in Old Greenwich is 41.8 years, 42.4 years for males, and 41.1 years for females.