Union Square U.S. National Register of Historic Places U.S. National Historic Landmark Union Square looking north from 14th Street (May 2010) Show map of Manhattan Show map of New York City Show map of New York Show map of the US Location Manhattan, New York City Coordinates Coordinates: 40°44′08″N 73°59′26″W﻿ / ﻿40.73556°N 73.99056°W﻿ / 40.73556; -73.99056 Built 1882 (laid out c. 1832)[1] Architect Frédéric Auguste Bartholdi, et al. NRHP reference # 97001678[2] Significant dates Added to NRHP December 9, 1997[2] Designated NHL December 9, 1997[3]