Mildred Bailey (born Mildred Rinker; February 27, 1907 – December 12, 1951) was a Coeur d'Alene jazz singer during the 1930s, known as "The Queen of Swing", "The Rockin' Chair Lady", and "Mrs. Swing".

She recorded the songs "For Sentimental Reasons", "It's So Peaceful in the Country", "Doin' The Uptown Lowdown", "Trust in Me", "Where Are You?", "I Let a Song Go Out of My Heart", "Small Fry", "Please Be Kind", "Darn That Dream", "Rockin' Chair", "Blame It on My Last Affair", and "Says My Heart". She had three records that reached number one on the popular charts.

Bailey grew up on the Coeur d'Alene Reservation in Idaho, where her mother was an enrolled citizen. The family moved to Spokane, Washington, when she was 13. Her younger brothers also became musicians. Her brother, Al Rinker, started to perform as a singer with Bing Crosby in Spokane and became a member of The Rhythm Boys. As adults, Charles Rinker was a lyricist, and Miles Rinker was a clarinet and saxophone player who later became a booking agent.