Montagu House

Montagu House or Montague House may refer to:

England

 * Montagu House, Bloomsbury, former mansion that became first home of the British Museum, also known as Montague House, since demolished
 * (a slang term for British Museum, on Great Russell Street, London, on site of former mansion)
 * Montagu House, Portman Square, built for Elizabeth Montagu on Portman Square
 * Montagu House, Whitehall, another London mansion
 * Montagu House, Blackheath

United States

 * Henry Montague House, Kalamazoo, Michigan, listed on the National Register of Historic Places

Australia

 * Monty House (Montague Grant House, born 1946), Western Australian politician