Middletown, CT has a population of 46,933 and is the 879th largest city in the United States. The population density is 1,144 per sq mi which is 77% higher than the Connecticut average and 1163% higher than the national average. The median age in Middletown is 36 which is approximately 10% lower than the Connecticut average of 41. In Middletown, 45% of the population over 15 years of age are married, 82% speak English and 6% speak Spanish. 60% of Middletown residents were born in Connecticut, 26% were born out of state, 2% were born outside of the United States and 12% were foreign born.