The Walker School, formerly known as the Joseph T. Walker School, is a private school in Marietta, Georgia, United States, on Cobb Parkway (U.S. 41) in what was originally Sprayberry High School. It was founded in 1957 as the St. James Day School at St. James Episcopal Church near the Marietta square. In 1972 the school became an independent body as the Joseph T. Walker School. The school teaches students in pre-kindergarten through 12th grade at the same location.