Park Square Historic District is a historic district located at Franklinville in Cattaraugus County, New York. The district encompasses the historic core of the village of Franklinville and include the landscaped village green, brickpaved streets, and the commercial or civic buildings fronting on the square or located immediately adjacent to it. Significant buildings range in date from 1828 to 1924 and reflect a variety of 19th-century and early 20th-century architectural styles including Queen Anne, Italianate, and Classical Revival styles. The village square was established in 1876. The district contains 21 contributing buildings and 2 contributing structures.