Bethel, CT has a population of 9,541 and is the 4,079th largest city in the United States. The population density is 2,333 per sq mi which is 260% higher than the Connecticut average and 2475% higher than the national average. The median age in Bethel is 42 which is approximately 4% higher than the Connecticut average of 41. In Bethel, 57% of the population over 15 years of age are married, 78% speak English and 6% speak Spanish. 50% of Bethel residents were born in Connecticut, 31% were born out of state, 2% were born outside of the United States and 17% were foreign born.