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is a village in St. Clair County, Illinois, at the south terminus of Illinois Route 163 (locally, "Jefferson Avenue") where it intersects Illinois Route 158 (locally, "Washington Avenue"). The population was 2,794 at the 2000 census, but a more recent study in July 2006 estimated the number at 3,247.
During a barn-raising in 1836, it was proposed that a town be incorporated on land belonging to Henry Randleman. The name "Centreville" was proposed, as the site was equidistant from Belleville, Columbia, and Pittsburg Lake. The town was platted on 13 March 1837. In 1880, its name was changed to Millstadt, as the name Centreville was in use by another nearby town.
Another Account (Millstadt School Website): "The story of how Millstadt developed out of "Centreville" goes something like this. The current Centerville and our Centreville each had a post offices through which a great deal of mail became confused and mis-delivered. Our town's forefathers, upon applying for formal organization through the state, supposedly decided on the name "Mittlestadt or Middlestadt" which means literally "center city"; somehow the state misread the writing and sent back the papers reading "Millstadt". As you can guess, the governing group decided to keep that name as we had several mills at that time and the name fit."