Mildred Bailey (born Mildred Rinker; February 27, 1907 – December 12, 1951) was a Native American jazz singer during the 1930s, known as "The Queen of Swing", "The Rockin' Chair Lady" and "Mrs. Swing". Some of her best-known hits are "It's So Peaceful in the Country", "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 singles that made number one on the popular charts.

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