Mary Lou or Marylou may refer to:

• Mary Lou (name), including list of persons with this given name
• Mary Lou (actress), American actress Mary Lou Kolbenschlag (born 1992)

• Mary Lou (1928 film), a German silent film
• Mary Lou (1948 film), an American film
• Mary Lou, the working title for the 2018 film Avengers: Infinity War
• Mary Lou 2, the working title for the 2019 film Avengers: Endgame

• "Mary Lou", a 1955 song by Young Jessie
• "Mary Lou", a song by Bruce Springsteen on his 1998 album Tracks
• Marylou (album), an album by Swiss singer Anna Rossinelli
• "Good Bye Mary Lou" a song by Angels of Light from their fifth record We Are Him
• Hello Mary Lou, a song by Gene Pitney recorded by Johnny Duncan, Ricky Nelson and Gene Pitney himself.

• " Hello Mary Lou", a song recorded in 1961 by Ricky Nelson
• Mary Louise (name), also Mary Louisa

This disambiguation page lists articles associated with the title Mary Lou.
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