Sylvia Clevenger (born as Sylvia Mae Hughes; April 16, 1891–January 7, 1951) was an American prostitute who worked with madam Pearl Elliott and was a minor associate of the John Dillinger gang. Her brother William was the former husband of Elliott. She was married three times, reverting to her maiden name of Hughes after her divorce from her second husband, John Clevenger, in 1930. She lived for much of her life in Kokomo, Indiana, and died in 1951 in Michigan City, Indiana.