Connie Haines (born Yvonne Marie Antoinette Jasme; January 20, 1921 – September 22, 2008) was an American singer and actress. Her 200 recordings were frequently up-tempo big band songs with the Harry James and Tommy Dorsey orchestras, and Frank Sinatra.

After a number of regional successes and winning the Major Bowes contest, she was hired by Harry James, who asked her to change her name. In 1981, she recalled: "He said you don't look like Yvonne Marie Antonette Jasme. And there would be no room on the marquee for me. You look like a Connie to me." She became the lead singer on The Abbott and Costello Show from 1942 to 1946. She later joined Tommy Dorsey, and Haines credited Dorsey with developing her style further. Haines performed in a number of films, including Duchess of Idaho.