Seneca County Ohio (Vacant / Not In Use) has 2 places on the National Register of Historic Places.
Some of the country's most noteable architects helped create the Seneca County places including Joseph Slanser and MorrisWilliam. Prominent architectural styles found in Seneca Country are .
Henny Barn
(added 1979 - - #79003646)
Also known as Drown Barn
W 1/2, SW 1/4, section 1, N side of Country Road 34 east of Northwestern RR tracks , Flat Rock