Sara Martin (June 18, 1884 – May 24, 1955) was an American blues singer, in her time one of the most popular of the classic blues singers. She was billed as "The Famous Moanin' Mama" and "The Colored Sophie Tucker". Martin made many recordings, including a few under the names Margaret Johnson and Sally Roberts. Martin was born in Louisville, Kentucky, United States and was singing on the African-American vaudeville circuit by 1915.

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