Located about 58 miles northwest of Dayton, Celina is situated on the northwestern shores of Grand Lake St. Marys. Landmarks include Immaculate Conception Catholic Church, WCSM-FM and WCSM. Celina is the birthplace of Rick Derringer, rock musician.
- CountyMercer County
- Population10,935 (2020 U.S. Census)
- Historic places4 on the National Register


































Immaculate Conception Catholic Church
Calvin E. Riley House
Sen. Thomas J. Godfrey House
Otis Hospital