Rosa Rio (June 2, 1902 – May 13, 2010) was the stage name of American concert pianist Elizabeth Raub, who also provided scores and arrangement for theater, radio, television and film productions later becoming a teacher of music and voice. She started her career as a theatre performer before becoming a silent film accompanist, after which she became a leading organist on network radio and television for soap operas and dramas. In 1993 she reprised her film accompaniment career in Florida, providing the scores for early productions, some of which she had accompanied some 80 years earlier, on their release to cinema.

Known as "Queen of the Soaps," Rio worked for 22 years in radio, providing the organ background music for 24 radio soap operas and radio dramas, and playing an average of five to seven shows per day. Some days she went from one program immediately to another—as when Lorenzo Jones and Bob and Ray were adjacent on NBC's schedule during the early 1950s—with less than 50 seconds to run from one NBC studio to another. Some of the programs she played for included Bob and Ray, Ethel and Albert, Front Page Farrell, Lorenzo Jones, My True Story, The Shadow and When a Girl Marries. During World War II she had her own radio show, Rosa Rio Rhythms.