William Julius "Judy" Johnson (1889-1989) was a Negro League baseball player from Delaware. He played third base, batted and threw right. He played for the Darby Daisies, Hilldale, Homestead Grays, and Pittsburgh Crawfords.

He was elected to the Baseball Hall of Fame in 1975.

The playing field of the Wilmington Blue Rocks, a minor league baseball team in the Kansas City Royals organization, is named Judy Johnson Field in his honor.