1918 Southern Intercollegiate Athletic Association football season

The 1918 Southern Intercollegiate Athletic Association football season was the college football games played by the member schools of the Southern Intercollegiate Athletic Association as part of the 1918 college football season. The season began on September 28.

Georgia Tech was conference champion. Center Bum Day was the first Southern player ever selected to Walter Camp's All-America first-team.

Regular season
SIAA teams in bold.

All-Americans

 * E – Bill Fincher, Georgia Tech (MS; TM-1, WC-2)
 * T – Joe Guyon, Georgia Tech (MS)
 * C – Bum Day, Georgia Tech (WC-1)
 * HB – Buck Flowers, Georgia Tech (WC-2 [fb]; TM-2)