Middletown is a city located in Middlesex County Connecticut. It is also the county seat of Middlesex County. With a 2020 population of 45,912, it is the 13th largest city in Connecticut and the 860th largest city in the United States . Middletown is currently declining at a rate of -0.38% annually and its population has decreased by -3.64% since the most recent census, which recorded a population of 47,648 in 2010. Middletown reached it's highest population of 47,742 in 2011. Spanning over 42 miles, Middletown has a population density of 1,119 people per square mile.
The average household income in Middletown is $89,038 with a poverty rate of 12.03%. The median rental costs in recent years comes to $1,133 per month, and the median house value is $231,300. The median age in Middletown is 37 years, 35.3 years for males, and 40.5 years for females.