Delaware County, Ohio - Official site presenting links to the board of commissioners, board of elections, building department, prosecutor, recorder, and regional planning office. Delaware County Extension Office - Branch office of Ohio State University, it combines the needs of local citizens and communities, with new research and technical information. Delaware County Convention and Visitors Bureau - Includes information about local festivals and events, recreation, shopping, lodging, and attractions in the county. Delaware County Sheriff's Office - Describes the broad cross section of activities performed each day in the department. County Map - Ohio Department of Transportation map of Delaware County. Profile for Delaware County - Information on the political infrastructure of the county.