Terryville, CT has a population of 5,431 and is the 6,110th largest city in the United States. The population density is 1,967 per sq mi which is 204% higher than the Connecticut average and 2071% higher than the national average. The median age in Terryville is 38 which is approximately 5% lower than the Connecticut average of 41. In Terryville, 53% of the population over 15 years of age are married, 94% speak English and 2% speak Spanish. 79% of Terryville residents were born in Connecticut, 16% were born out of state, 2% were born outside of the United States and 3% were foreign born.