Prospect is a village in Marion County, Ohio, United States. The population was 1,067 at the 2020 census. The village is served by Elgin Local School District.

Marion County is a county located in the U.S. state of Ohio. As of the 2020 census, the population was 65,359. Its county seat is Marion. The county was created in 1820 and later organized in 1824. It is named for General Francis "The Swamp Fox" Marion, a South Carolinian officer in the Revolutionary War.