The 1912 College Football All-Southern Team consists of American football players selected to the College Football All-Southern Teams selected by various organizations for the 1912 Southern Intercollegiate Athletic Association football season. Lew Hardage was selected for Walter Camp's third-team All-American. Vanderbilt won the SIAA championship. Georgetown won the SAIAA championship.
Innis Brown, a referee throughout the south, and captain of Vanderbilt's 1905 championship team, was hired to select the team of the Atlanta Constitution. The Constitution's editor Dick Jemison also selected a team. Former Georgia player and captain and then assistant Harold Ketron selected a team. Georgia Tech head coach John Heisman as usual picked one also. Former Mississippi head coach Nathan Stauffer selected an All-Southern team for Collier's Weekly.