Danielson, CT has a population of 3,999 and is the 7,454th largest city in the United States. The population density is 3,656 per sq mi which is 464% higher than the Connecticut average and 3936% higher than the national average. The median age in Danielson is 41 which is approximately 2% higher than the Connecticut average of 41. In Danielson, 39% of the population over 15 years of age are married, 80% speak English and 7% speak Spanish. 48% of Danielson residents were born in Connecticut, 41% were born out of state, 2% were born outside of the United States and 9% were foreign born.