Knocky Parker (August 8, 1918, Palmer, Texas – September 3, 1986, Los Angeles, California), born John William Parker, II, was an American jazz pianist. He played primarily ragtime and Dixieland jazz.

A native of Texas, Parker played in the Western swing bands The Wanderers (1935) and the Light Crust Doughboys (1937–39) before serving in the military during World War II.

After the war he worked with Zutty Singleton and Albert Nicholas. He became an English professor at Kentucky Wesleyan College and the University of South Florida. On the side, he played piano with Tony Parenti, Omer Simeon and Doc Evans. He recorded albums for Euphonic, GHB, Jazzology, London, Progressive, Paradox, Audiophile and Texstar. At Audiophile, he was one of the first to record all known ragtime pieces by Scott Joplin, excluding "The Silver Swan", which was not discovered at that point.

In 1984, he was nominated for a Grammy Award with Big Joe Turner for Big Joe Turner with Knocky Parker and His Houserockers.