Lakes in Union County, Ohio      Heart of Ohio Fish and Game Association Reservoir Liggett Lake Richwood Lake Twin Lakes OTHER COUNTIES NEARBY Allen County Auglaize County Champaign County Clark County Crawford County Delaware County Erie County Fayette County Franklin County Greene County Hancock County Hardin County Henry County Huron County Knox County Logan County Madison County Marion County Miami County Montgomery County Morrow County Pickaway County Putnam County Richland County Sandusky County Seneca County Shelby County Wood County Wyandot County Ohio Lakes