Shelby County, Ohio, is located in the western part of the state and is part of the Dayton metropolitan area. Established in 1819, it is named after Isaac Shelby, a soldier and politician. The county seat is Sidney, which is known for its rich history and vibrant community. The county covers an area of approximately 580 square miles and features a mix of urban and rural landscapes. It is home to several parks and recreational areas, providing opportunities for outdoor activities. The local economy is diverse, with agriculture and manufacturing playing significant roles.