Danbury, CT has a population of 83,890 and is the 408th largest city in the United States. The population density is 2,000 per sq mi which is 209% higher than the Connecticut average and 2108% higher than the national average. The median age in Danbury is 38 which is approximately 7% lower than the Connecticut average of 41. In Danbury, 51% of the population over 15 years of age are married, 56% speak English and 26% speak Spanish. 38% of Danbury residents were born in Connecticut, 28% were born out of state, 2% were born outside of the United States and 31% were foreign born.