Ansonia is a city located in New Haven County Connecticut. With a 2020 population of 18,452, it is the 19th largest city in Connecticut and the 1980th largest city in the United States . Ansonia is currently declining at a rate of -0.54% annually and its population has decreased by -4.14% since the most recent census, which recorded a population of 19,249 in 2010. Ansonia reached it's highest population of 21,160 in 1970. Spanning over 6 miles, Ansonia has a population density of 3,066 people per square mile.
The average household income in Ansonia is $70,235 with a poverty rate of 13.73%. The median rental costs in recent years comes to $1,101 per month, and the median house value is $214,200. The median age in Ansonia is 40 years, 36.8 years for males, and 44.1 years for females.