[2] Construction was started on the original building in 1905; the school opened on January 23, 1907, as Central High.

An expansion occurred in 1923 and an auditorium and athletic fields were finished in 1930.

In the early twentieth century, the school housed night classes for immigrants who wished to gain American citizenship.

[3] South St. Paul athletic teams are nicknamed "Packers" and compete in the Metro East Conference.

[4] South St. Paul Secondary offers many athletics in the seasons of Fall, Winter, and Spring Fall • Cross Country • Football • Soccer-Girls/Boys • Swimming & Diving- Girls • Tennis- Girls • Volleyball Winter • Basketball- Girls/Boys • Dance Team • Gymnastics • Hockey- Boys/Girls • Swimming & Diving- Boys • Wrestling Spring • Baseball • Golf- Boys/Girls • Lacrosse- Boys/Girls • Softball • Tennis- Boys • Track & Field- Boys/Girls SSP has two competitive show choirs, the mixed-gender "SouthSide Sensation" and the all-female "Diamond Divaz".