James Price Johnson (February 1, 1894 – November 17, 1955) was an American pianist and composer. A pioneer of the stride style of jazz piano, he was one of the most important pianists who bridged the ragtime and jazz eras, and, with Jelly Roll Morton, one of the two most important catalysts in the evolution of ragtime piano into jazz. As such, he was a model for Count Basie, Duke Ellington, Art Tatum, and Fats Waller.