Dalton City is a village in Moultrie County, Illinois, United States. It is in the center of the state near the Macon County line, located along Route 121 at its intersection with Route 128 and between the larger villages of Bethany and Mount Zion. The population was 581 at the 2000 census, nearly 200 more than were present there during the 1960 census.Dalton City was incorporated as a village on September 15, 1877. The village was the birthplace of Henry Gleason, a 20th-century ecologist and taxonomist.Since the Cutback amendment Dalton City has been part of the 101st district of the Illinois House of Representatives. As of 2006 it is represented by Democrat Bob Flider of Mount Zion.