Shelby County, Ohio
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Shelby County is a county in the western portion of the U.S. state of Ohio. As of the 2020 United States Census, the population was 48,230. Its county seat is Sidney. Its name honors Isaac Shelby, first governor of Kentucky.
Shelby County Courthouse
Sidney as seen from the east
Mercer County, Ohio
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Mercer County is located in the U.S. state of Ohio. As of the 2020 census, the population was 42,528. Its county seat is Celina. The county was created in 1820 and later organized in 1824. It is named for Hugh Mercer, an officer in the American Revolutionary War.
Mercer County courthouse
Grand Lake St. Marys State Park
Graftonoceras fossil nautiloid, found near Coldwater, southern Mercer County.