P. D. Jackson-Olin High School is a high school in Birmingham, in the U.S. state of Alabama. Founded in 1952 as Western Olin High School, it was renamed after principal Pierre Denson Jackson. Affectionately known as J.O., it is the largest high school in the Birmingham City Schools System, serving over 1,700 students from the Ensley area. The school is located at 1300 Avenue F, adjacent to McAlpine Park.