College Corner is a village in the southwestern part of the U.S. state of Ohio in Butler and Preble counties, northwest of Oxford. It was settled in 1811 and takes its name from its position in the northwestern corner of the "College Township", the survey township designated the previous year by the Ohio General Assembly as the site of the state college that became Miami University. This survey township was later organized as a civil township, Oxford Township. The population was 407 at the 2010 census.
The village lies on the state line with Indiana and there is a 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.