Waynesville is a village in Wayne Township, Warren County, Ohio, United States. The population was 2,669 at the 2020 census. It is named for General "Mad" Anthony Wayne. The village, located at the crossroads of U.S. Route 42 and State Route 73, is known for its antique stores and its annual sauerkraut festival. Caesar Creek State Park is located 5 miles east of the village. Waynesville is served by the Mary L. Cook Public Library.