Port Gibson High School is a public high school in unincorporated Claiborne County, Mississippi, with a Port Gibson. It opened in 1924. It is part of the Claiborne County School District. The student body is 99 percent African American. The old Port Gibson High School campus is now used by Port Gibson Middle School and is listed on the National Register of Historic Places. The school's district includes all of Claiborne County, including the employee residences of Alcorn State University.