Union and State Streets Historic District is a national historic district located at Olean in Cattaraugus County, New York.

The district developed between about 1866 and 1939, and includes buildings in a variety of architectural styles including Beaux-Arts, Queen Anne, and Art Deco.

Other notable buildings include the Former First National Bank, current Manufacturers Hanover Building by Mowbray and Uffinger (c. 1915, 1938, 1950), Original First National Bank of Olean (c. 1866-1869), Masonic Temple by Warner and Brocket (1893), Olean House (c. 1889, 1893), and W.T.

[2] It was listed on the National Register of Historic Places in 2015.

This article about a historic property or district in Cattaraugus County, New York, that is listed on the National Register of Historic Places, is a stub.