Union Square Park (also known as Union Square) is an important and historic intersection in New York City, located where Broadway and the Bowery came together in the early 19th century. Today it is bounded by 14th Street to the south, Union Square West on the west side, 17th Street on the north, and on the east Union Square East, which links together Broadway and Park Avenue South to Fourth Avenue and the continuation of Broadway. The park is run by the New York City Department of Parks and Recreation.

Neighborhoods around the park are the Flatiron District to the north, Chelsea to the west, Greenwich Village and New York University to the south, and Gramercy to the east. Also nearby is The New School. The eastern side of the square is dominated by the Zeckendorf Towers.

Union Square is noted for its impressive equestrian statue of George Washington, created by Henry Kirke Brown and unveiled in 1856. Other statues in the park include the Marquis de Lafayette, created by Frédéric-Auguste Bartholdi, Abraham Lincoln, created by Henry Kirke Brown and James Fountain, donated by Daniel Willis James and sculpted by Adolf Donndorf. A newer addition, added in 1986, is a statue of Mahatma Gandhi in the southwest corner of the park.

In April 1861, soon after the fall of Fort Sumter, Union Square was the site of a patriotic rally that is thought to have been the largest public gathering in North America up to that time.

Union Square lies over 14th Street–Union Square, a New York City Subway complex served by the , , , , , , , and trains.