Defiance County Extension Office - Branch office of Ohio State University, it combines the needs of local citizens and communities, with new research and technical information. The Political Graveyard: Defiance County, Ohio - Site contains information on the political history of Defiance County, cemeteries and memorial sites in the county. Defiance County, Ohio - Official site includes a description and list of services of each agency, directory, history and township plat maps. Defiance County Sheriff's Office - Includes an overview of the department, current investigations, and the DARE program. County Map - Ohio Department of Transportation map of Defiance County. Profile for Defiance County - Information on the political infrastructure of the county.