Sara Allen (born March 23, 1954) is an American songwriter best known for her work with the duo Hall & Oates. Though the two of them never married, she was in a long-term relationship with Daryl Hall, which ended in 2001. She contributed to many of the duo's hit singles, including "You Make My Dreams", "Private Eyes", "I Can't Go for That (No Can Do)", and "Maneater".
The song "Sara Smile", Hall & Oates' first American hit, was about Sara Allen.
Her late sister Janna Allen was also a songwriter and also worked with Hall & Oates.