College Corner is a village in Butler and Preble counties in the southwestern part of the U.S. state of Ohio, 5 miles northwest of Oxford. The population was 407 at the 2010 census.The village lies on the state line with Indiana, where it borders the town of West College Corner, Indiana. The public school, part of the Union County–College Corner Joint School District, is bisected by the state line and is operated jointly with the Indiana authorities.The Preble County portion of College Corner is part of the Dayton Metropolitan Statistical Area, while the Butler County portion is part of the Cincinnati–Middletown, OH-KY-IN Metropolitan Statistical Area.