Decatur is a city located in Morgan County, Alabama. With a 2020 population of 53,602, it is the 9th largest city in Alabama and the 741st largest city in the United States. Decatur is currently declining at a rate of -0.61% annually and its population has decreased by -3.74% since the most recent census, which recorded a population of 55,683 in 2010. Decatur reached it's highest population of 55,887 in 2011. Spanning over 61 miles, Decatur has a population density of 990 people per square mile.
The average household income in Decatur is $63,768 with a poverty rate of 19.59%. The median rental costs in recent years comes to $645 per month, and the median house value is $133,000. The median age in Decatur is 40 years, 38.5 years for males, and 41.2 years for females. For every 100 females there are 90.0 males.