Decatur is a city located in Indiana. With a 2020 population of 9,989, it is the 78th largest city in Indiana and the 3101st largest city in the United States. Decatur is currently growing at a rate of 0.74% annually and its population has increased by 6.21% since the most recent census, which recorded a population of 9,405 in 2010. Spanning over 6 miles, Decatur has a population density of 1,657 people per square mile.
The average household income in Decatur is $52,768 with a poverty rate of 16.31%. The median rental costs in recent years comes to $595 per month, and the median house value is $93,100. The median age in Decatur is 39.3 years, 35.1 years for males, and 46.1 years for females. For every 100 females there are 100.3 males.