Gaiety Theatre or Gayety Theatre, and variations may refer to:
Asia
Gaiety Theater (Manila) (1935), Philippines
Gaiety Theatre, Shimla (opened 1887), Shimla, India
Gaiety Theatre, Yokohama (1870–1923), destroyed in the 1923 Kanto earthquake, Japan
Australia
Gaiety Theatre, Melbourne (1880–1930), Australia
Gaiety Theatre, Sydney (1880–1900), Australia
Gaiety Theatre, Zeehan (1898), Tasmania, Australia
Europe
Gaiety Theatre, Ayr, a theatre in Ayr, Scotland (1871)
Gaiety Theatre, Dublin, a theatre in Dublin, Ireland (opened 1871)
Gaiety Theatre, London, a musical theatre in London, UK (1864–1956)
Gaiety Theatre, Manchester, UK (1884–1957)
Gaiety Theatre, Isle of Man, an opera house and theatre in Douglas (opened 1900)
The Glasgow Gaiety Theatre, a cine-theatre in Glasgow, Scotland (1904–1965)
The Gaiety Theatre, Anglesey Castle, a private theatre at Plas Newydd (Anglesey) in Wales, UK (closed 1905)
North America
Canada
Gayety Theatre, Montreal, a 1970s theatre; see Théâtre du Nouveau Monde
United States
Gayety Theater, in The Block, Baltimore, Maryland
Gaiety Theatre (Boston, 1878), Massachusetts
Gaiety Theatre (Boston, 1908) (1908–1949), Massachusetts
Gaiety Theatre (male burlesque) (1976–2005), a male burlesque theater in New York, New York
Embassy Five Theatre, formerly the Gaiety Theatre (1908–1982), a Broadway theater in New York, New York
Village East by Angelika, formerly the Gayety Theatre, a movie theater in New York, New York
Gayety Theatre, a burlesque theater in the Sporting District of Omaha, Nebraska, from 1908 to 1928
Gayety Theater, former name of the Byham Theater in Pittsburgh, Pennsylvania
Gayety Theater, Washington, D.C. (1907-1959); see William H. McElfatrick § Works