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Illinois / Decatur
Now you can skip hours of internet research and jump straight to getting answers with our meaningful at-a-glance Demographic Starter Report. With the most current & most popular demographic data points, it's the perfect starting point for your research about Decatur.
All Decatur population data above are from the US Census Bureau.
With 74,710 people, Decatur is the 16th most populated city in the state of Illinois out of 1,365 cities. But watch out, Decatur, because Bolingbrook with 73,936 people and Palatine with 69,350 people are right behind you.
The largest Decatur racial/ethnic groups are White (70.6%) followed by Black (18.9%) and Two or More (6.6%).