Mystery Girl is an album by Roy Orbison

Mystery Girl or variants may refer to:

• Mystery Girl (film) Nickelodeon television movie
• The Mystery Girl, lost 1918 American drama silent film directed by William C. deMille and written by Marion Fairfax and George Barr McCutcheon.
• His Mystery Girl, 1923 American silent comedy film directed by Robert F. Hill and starring Herbert Rawlinson, Ruth Dwyer and Margaret Campbell
• "Mystery Girl", single by Jess Conrad 1961
• "Mystery Girl", song by Atlantic Starr from Radiant (Atlantic Starr album) 1981
• "Mystery Girl", song by ex-Aerosmith guitarist Brad Whitford and then ex-Ted Nugent vocalist Derek St. Holmes Whitford/St. Holmes 1981
• "Mystery Girl", song by Alexandra Savior from her album Belladonna of Sadness (album)

• Ernst C. Stueckelberg
• Ernst David Hellinger
• Ernst Dehmel
• Ernst Dehner
• Ernst Delevez
• Ernst Diehl
• Ernst Dohnanyi
• Ernst Duellberg
• Ernst Dullberg
• Ernst Düllberg
• Ernst-Eberhard Hell
• Ernst Edlichka
• Ernst Eduard Taubert
• Ernst Eichner
• Ernst Eklund
• Ernst Eklund (actor)
• Ernst, Elector of Saxony
• Ernst Enno
• Ernst equation
• Ernster dezso
• Ernst-Erich Hirschfeld
• Ernst Eskhult
• Ernst Evald Bergroth
• Ernst Fabricius
• Ernst Fasan