Unionville, Illinois

Unionville, Illinois may refer to:
 * Unionville, Massac County, Illinois, an unincorporated community in Massac County
 * Unionville, Vermilion County, Illinois, an unincorporated community in Vermilion County
 * Unionville, Whiteside County, Illinois, an unincorporated community in Whiteside County
 * Streator, Illinois, formerly known as Unionville