Sol Marcus (October 1, 1912 – February 5, 1976) was an American songwriter and pianist. Born in New York, he began working as a songwriter with Bennie Benjamin and Eddie Seiler (1911–1952) in the mid-1930s. He had his first writing successes with "I Don't Want to Set the World on Fire" (1941), co-written with Benjamin, Seiler, and Eddie Durham, and "When the Lights Go On Again (All Over the World)" (1942), co-written with Benjamin and Seiler. Later in the 1940s, he had further success with "Till Then" (1945), a hit for the Mills Brothers co-written with Seiler and Guy Wood; and "Ask Anyone Who Knows", written with Seiler and Al Kaufman for The Ink Spots.