At the time, PDHS was known as Pioneer High School.

The school graduated its first official class in 1908, the centennial of which was celebrated in May 1988.

[3] The school yearbook, Au Roarer, has been published annually since 1948.

[3] During Jim Crow segregation of public schools, black educator Carrie Martin established a school for black students off Highway 3 south of downtown Plain Dealing, which would eventually be named for her.

[8] The Plain Dealing Lions compete in District 1-1A of the Louisiana High School Athletic Association.