Mansfield Industrial city (1990 pop. 50,627), seat of Richland co., N central Ohio, in a hilly region surrounded by fertile farmlands; inc. 1828. It is a manufacturing, commercial, and insurance center. Among its many diverse products are tires, automobile bodies, electrical appliances, sports vehicles, and brass goods. A branch of Ohio State Univ. is there. The home of Louis Bromfield is used as an ecological center and experiment farm. Also of interest are South Park, with a reconstructed blockhouse of the War of 1812, and Kingwood Center and Gardens, with landscaped floral displays and a pre-Civil War French-provincial mansion.