Carrollton is a city located in Greene County Illinois. It is also the county seat of Greene County. With a 2020 population of 2,370, it is the 454th largest city in Illinois and the 7005th largest city in the United States . Carrollton is currently declining at a rate of -0.59% annually and its population has decreased by -4.59% since the most recent census, which recorded a population of 2,484 in 2010. Carrollton reached it's highest population of in . Spanning over 2 miles, Carrollton has a population density of 1,246 people per square mile.
The average household income in Carrollton is $71,794 with a poverty rate of 7.80%. The median rental costs in recent years comes to $721 per month, and the median house value is $89,300. The median age in Carrollton is 39.3 years, 38.8 years for males, and 39.5 years for females.