Trumbull, CT has a population of 36,477 and is the 1,155th largest city in the United States. The population density is 1,570 per sq mi which is 142% higher than the Connecticut average and 1632% higher than the national average. The median age in Trumbull is 43 which is approximately 6% higher than the Connecticut average of 41. In Trumbull, 66% of the population over 15 years of age are married, 83% speak English and 4% speak Spanish. 59% of Trumbull residents were born in Connecticut, 27% were born out of state, 2% were born outside of the United States and 12% were foreign born.