Madame X or Madam X may refer to:
Madame X (play), a 1908 stage play by French playwright Alexandre Bisson, with numerous adaptations
Film Madame X (1916 film), starring Dorothy Donnelly Madame X (1920 film), starring Pauline Frederick Madame X (1929 film), starring Ruth Chatterton Madame X (1937 film), starring Gladys George Madame X (1952 film), starring Gloria Romero Madame X (1954 film), a Greek drama film Madame X (1955 film), a Mexican drama film Madame X (1966 film), starring Lana Turner Madame X: An Absolute Ruler, 1978 German fantasy film directed by Ulrike Ottinger Madame X (1981 film), starring Tuesday Weld Madam X (1994 film), starring Rekha Madame X (2000 film), starring Ina Raymundo Madame X (2010 film), an Indonesian superhero film Madame X (2021 film), a documentary film about Madonna's Madame X Tour
Music Madam X (band), an American rock group formed in 1982 Madame X (album), 2019 release by Madonna Madame X Tour, associated concert tour Madame X: Music from the Theater Xperience, the live album recorded during the tour
Other uses Madame X, a character played by Anne Brochet in The Story of Marie and Julien Madame X (device), a bombe cryptanalyser used by the US Army during World War II Madame Xanadu, a 2012 comic called "Madame X" which featured this character under DC's "National Comics" imprint "Madame X", internal code name for the Pontiac Phantom concept car Madame X, a nickname of American singer Madonna, given by Martha Graham Madame X, a nickname for Agnes Meyer Driscoll, a 20th-century American cryptanalyst. Limeslade Mystery, also known as the Madame X Mystery
See also Portrait of Madame X, 1884 portrait of Virginie Amélie Avegno Gautreau by John Singer Sargent The Strange Madame X, 1951 film The Trial of Madame X, 1955 film Miss X (disambiguation) Lady X (disambiguation) Mister X (disambiguation)