- Welcome to Portage County 6970 SR 88 Ravenna Ohio 44266 Phone: (330) 296-6432 Fax: (330) 296-7737 Office Hours: Monday- Friday: 8:00 am - 4:30 pm The Ohio State University, The United States Department of Agriculture, and Portage County Commissioners Cooperating County Extension Staff Calendar of Events Program Highlights Extension Advisory Committee Agriculture & Natural Resources Farmland ...www.ag.ohio-state.edu/~port