Sol Marcus (October 1, 1912 – February 5, 1976) was an American songwriter and pianist born in New York City. He began his songwriting career in the mid-1930s, collaborating with Bennie Benjamin and Eddie Seiler. Marcus achieved early success with songs like "I Don't Want to Set the World on Fire" (1941) and "When the Lights Go On Again (All Over the World)" (1942). In the 1940s, he co-wrote hits such as "Till Then" for The Mills Brothers and "Ask Anyone Who Knows" for The Ink Spots.

In the mid-1950s, Marcus reunited with Bennie Benjamin to write songs like "Fabulous Character" for Sarah Vaughan and "Lonely Man" for Elvis Presley. One of their notable collaborations was "Don't Let Me Be Misunderstood," co-written with Horace Ott in 1964, which became a hit for Nina Simone, The Animals, Santa Esmeralda, and Elvis Costello.

Marcus passed away in 1976 in Linden, New Jersey. His work continues to be recognized in various films and soundtracks, including "Kill Bill: Vol. 1" and "Layer Cake."