Decatur has both a civil-class and population place designation from the USGS Domestic GeoNames resource .
The USGS Domestic GeoNames resource has two listings for Decatur : `` City of Decatur '' , which is a Civil-class designation , and `` Decatur '' , which is a Populated Place designation , which have slightly different coordinate centroids : `` City of Decatur '' centroid is located at , while the `` Decatur '' centroid is at .
Decatur, Illinois