1956–57 Southern Football League

The 1956–57 Southern Football League season saw Kettering Town win the championship. Five Southern League clubs applied to join the Football League at the end of the season, but none were successful.

The league featured no new clubs for this season.

^{1 The system of using goal average to separate two teams tied on points was used up until the 1976-77 season.}

^{2 The points system: 2 points for a win, 1 point for a draw and 0 points for losing.}

Five Southern League clubs applied for election to the Football League. However, none were successful as all four League clubs were re-elected.