The Political Graveyard: Union County, Ohio - Site contains information on the political history of Union County, cemeteries and memorial sites in the county. Union County, Ohio - Official site provides information about the government, public safety, zoning, building and services in the county. Union County Health Department - Mission is to promote the wellness of all Union County residents and protect their health and safety by providing high quality public health services. Union County Extension Office - Branch office of Ohio State University, it combines the needs of local citizens and communities, with new research and technical information. Union County Chamber of Commerce - Information on chamber events, community services, county statistics, and government offices. County Map - Ohio Department of Transportation map of Union County. Capitolimpact: Profile for Union County - Information on the political infrastructure of the county.