Johnny Costa (born John Costanza; January 18, 1922 – October 11, 1996) was an American jazz pianist. Given the title “The White Art Tatum” by jazz legend Art Tatum, Costa is best known for his work as musical director of the children’s television series Mister Rogers’ Neighborhood.

Costa learned to play accordion at age seven and was reading music three years later. Frank Oliver, Costa’s high school music teacher, urged him to learn the piano after discovering that Costa had perfect pitch. Costa graduated from Carnegie Mellon University with degrees in music and in education. In case he failed as a musician, Costa prepared himself to teach. On the day of his graduation, he began work as the house pianist for a radio station in Pittsburgh. Eventually he performed the same role for KDKA-TV in Pittsburgh. He provided piano and organ music for many programs, eventually teaming with Fred Rogers to arrange and perform the music heard on Mister Rogers’ Neighborhood.

Costa’s first recording was The Amazing Johnny Costa, a Savoy LP released in 1955 and reissued on CD as Neighborhood in 1989. Although his increasingly lucrative career was beginning to bring him international attention, the amount of time away from his family and friends led him to live and perform only in western Pennsylvania. He stopped traveling and gave up his job as musical director of The Mike Douglas Show. He returned to Pittsburgh and remained there for the rest of his life.