Allen County Ohio (Historic Districts) has 1 places on the National Register of Historic Places.
Some of the country's most noteable architects helped create the Allen County places including Andrew DeCurtins, Myer, J.H. and . Prominent architectural styles found in Allen Country are Tudor Revival.
West Market Street Boulevard Historic District
(added 2004 - - #04001201)
Also known as West Market Street Boulevard Park Addition, Westwood