There are a number of resources available to research family history in Union County.  Below is a list of links that will assist you with your research.  

Union County Family History Related Links    

Marysville Public Library   

Plain City Historical Society

Plain City Public Library

Richwood-North Union Public Library

Union County Cemetery Photographs  

Union County Genealogical Society   

Union County Historical Society   

Ohio Family History Related Links   

Ohio Genealogical Society   

Ohio History Connection