The New Amsterdam Theatre is a Broadway theatre located at 214 West 42nd Street between Seventh and Eighth Avenues in the Theater District of Manhattan, New York City, off Times Square. It was built in 1902–1903 and was designed by the architecture firm of Henry Hertz and Hugh Tallant. Now the New Amsterdam Theatre is the home to Disney’s Aladdin. Aladdin opened at the New Amsterdam Theatre, becoming the third production to play her stage, and now one of Broadway’s biggest blockbusters.

The Roof Garden, where more risqué productions were presented, and which no longer exists, was added in 1904, designed by the same firm. The remainder of the building was utilized for offices.
From 1913 to 1927, the theatre was the home of the Ziegfeld Follies, whose producer, Florenz Ziegfeld Jr., maintained an office in the building, and operated a nightclub on the roof. George White's Scandals and Eva LeGallienne's Civic Repertory Theatre were subsequent tenants. It was used as a movie theatre beginning in 1937, closed in 1985, and was leased by The Walt Disney Company and renovated by Hardy Holzman Pfeiffer in 1995–97 to be the flagship for Disney Theatrical Productions presentations on Broadway.

Both the Beaux-Arts exterior and the Art Nouveau interior of the building are New York City landmarks, having been designated in 1979. In addition, the building was added to the National Register of Historic Places in 1980.

Along with the Hudson and Lyceum Theatres, also built in 1903, the New Amsterdam is one of the oldest surviving Broadway venues.

The New Amsterdam has also hosted events benefitting Broadway Cares/Equity Fights AIDS, including the annual Easter Bonnet Competition, until the event moved to the Minskoff Theatre. The New Amsterdam is now home to BC/EFA's annual Red Bucket Follies (formerly known as Gypsy of the Year Competition), the fall/winter sister event to the Easter Bonnet. In recent years, the benefit's honored guest had been centenarian Doris Eaton Travis, who originally performed on the New Amsterdam stage in the Ziegfeld Follies of 1919.

In 1999, the Backstreet Boys televised a concert for Disney Channel called Backstreet Boys In Concert from the New Amsterdam Theatre. It was a prelude to their 1999-2000 Into the Millennium Tour.