The New York State Pavilion is a pavilion at Flushing Meadows–Corona Park in Queens, New York City, New York. Constructed for the 1964 New York World's Fair, it was designed by the architects Philip Johnson and Richard Foster, with Lev Zetlin as the structural engineer. The pavilion consists of three reinforced concrete-and-steel structures: the Tent of Tomorrow, observation towers, and Theaterama. It is owned by the New York City Department of Parks and Recreation (NYC Parks) and listed on the National Register of Historic Places.

The New York State Pavilion was first proposed in January 1960. After the New York state government agreed to host an exhibit at the World's Fair in early 1962, work on the structures began on October 8, 1962. It opened on April 23, 1964, and operated as a World's Fair attraction for two years. NYC Parks took over the structures in 1967 and leased out the Theaterama as a performing-arts theater in 1969. The Tent of Tomorrow briefly served as a concert venue and roller rink in the 1970s, while the observation towers never reopened. After briefly reopening in the 1980s, the Tent of Tomorrow was abandoned into the 21st century. Following years of preservation efforts, the Tent of Tomorrow was repainted in 2014, and the structures underwent rehabilitation starting in 2019.

The Tent of Tomorrow is an elliptical structure measuring 250 by 350 feet (76 by 107 m) across, with a cable suspension roof and a terrazzo highway map of New York state on its floor. There are three observation towers, the tallest of which is 226 feet (69 m) high. The Theaterama, a drum-shaped reinforced concrete structure, has housed the Queens Theatre performing arts center since 1989. The New York State Pavilion was used for TV and movie sets over the years, and it has had generally positive architectural reception.

Flushing Meadows–Corona Park, a former ash dump in the New York City borough of Queens, was used for the 1939/1940 New York World's Fair. At the conclusion of the fair, it was used as a park. The Flushing Meadows site was selected in 1959 for the 1964 New York World's Fair. Gilmore David Clarke and Michael Rapuano, designers of the original World's Fair layout, were retained to tailor the original 1939 park layout for the new fair. New York City parks commissioner Robert Moses was president of the World's Fair Corporation, which leased the park from the city until 1967, after the fair's completion.

Moses had proposed a World's Fair pavilion for the government of New York state as early as January 1960, four months before he became the president of the World's Fair Corporation. By late 1960, Moses was drawing up plans for exhibits at the pavilion, including exhibits about tourism, New York state geography, and the New York Power Authority. The corporation's officials discussed the location of the proposed pavilion for over a year, and they ultimately selected a site known as Block 46 in May 1961. The site covered 129,392 square feet (12,021 m²) and was chosen specifically because it was slightly larger than Block 45, which was to be occupied by the government of New Jersey. Negotiations over potential exhibits, including discussions over a potential fashion exhibit, continued through 1961.

New York's lieutenant governor, Malcolm Wilson, signed a contract with the World's Fair Corporation in February 1962, allowing the government of New York state to sponsor an exhibit at the 1964 World's Fair. At the time, the governments of 30 states and Puerto Rico were planning pavilions at the fair, and the New York State Pavilion was to be the largest of these structures. The pavilion was one of two structures that the New York state government would erect for the World's Fair, along with the New York State Theater in Manhattan. During the pavilion's development, New York governor Nelson Rockefeller sought to divert funds from the project to the New York State Theater, since the pavilion was originally supposed to be temporary. It was also one of several exhibit spaces in the World's Fair that focused on New York; there were also pavilions for New York City, the Port of New York Authority, and the Long Island Rail Road.

Five architects participated in an unofficial architectural design competition. Philip Johnson, who also designed the New York State Theater, was hired to design the pavilion in mid-1962. Johnson later stated that Rockefeller had personally selected him for the project. The Thompson–Starrett Company received the general contract for construction. At the time, the World's Fair Corporation had already created preliminary plans for structures on Block 46. Although the structures were initially meant to be temporary, Moses and Johnson had agreed to create a permanent theater for the site by June 1962. Another change to the original plans was the addition of observation towers, since Rockefeller wanted the New York State Pavilion to be the tallest structure in the fair. Initially, the World's Fair Corporation would not allow any structures higher than 80 feet (24 m) in the fair's federal and state section. After Johnson persisted, the corporation agreed in August 1962 to allow the New York State Pavilion to include taller structures.

Details of the New York State Pavilion were announced on October 8, 1962, when Rockefeller drove a deep foundation into the ground during a groundbreaking ceremony for the pavilion. The structure was to contain a Tent of Tomorrow (also known as the County Fair of the Future) for exhibits and events, a theater called Theaterama, and three observation towers. The state government allocated $11 million to the World's Fair, expecting to earn revenue by selling tickets to the pavilion's restaurants and observation deck. Officials estimated that the pavilion would have 12 million to 13 million visitors during the World's Fair, which was to last two years. Revisions to the design continued through early 1963, when the foundations were modified to allow the structures to remain standing for a longer period.