Cedarville is a village in Greene County, Ohio, United States. The population was 3,828 at the 2000 census. It is the home of Cedarville University and Cedarville High School.
Cedarville is part of the Dayton Metropolitan Statistical Area. It is served by a branch of the Greene County Public Library.
For many years beginning in the 1880s, public life in Cedarville centered around the downtown Cedarville Opera House; it survives to the present day, and is listed on the National Register of Historic Places.