Decatur is located in Morgan County, AL. The population is 55,774, making Decatur the largest city in Morgan County and the 9th largest city in the state of Alabama.
There are 23 public schools in Decatur with an average Homefacts rating of B. The total crime rate for Decatur is moderate, and there are 34 registered sex offenders residing in the city. Unemployment in Decatur is low and the median home sales price is $0.