New Haven is a city located in Gallatin County Illinois. With a 2020 population of 352, it is the 974th largest city in Illinois and the 14747th largest city in the United States . New Haven is currently declining at a rate of -4.09% annually and its population has decreased by -18.71% since the most recent census, which recorded a population of 433 in 2010. New Haven reached it's highest population of in . Spanning over 1 miles, New Haven has a population density of 283 people per square mile.
The average household income in New Haven is $53,491 with a poverty rate of 18.09%. The median rental costs in recent years comes to $509 per month, and the median house value is $51,700. The median age in New Haven is 48.8 years, 52.5 years for males, and 43.2 years for females.