Waterbury is a city located in New Haven County Connecticut. With a 2020 population of 106,458, it is the 5th largest city in Connecticut (after , , , and ) and the 291st largest city in the United States . Waterbury is currently declining at a rate of -0.52% annually and its population has decreased by -3.54% since the most recent census, which recorded a population of 110,366 in 2010. Waterbury reached it's highest population of 110,350 in 2010. Spanning over 29 miles, Waterbury has a population density of 3,732 people per square mile.
The average household income in Waterbury is $57,747 with a poverty rate of 23.38%. The median rental costs in recent years comes to $969 per month, and the median house value is $130,700. The median age in Waterbury is 34.8 years, 33.1 years for males, and 36.6 years for females.