The 1975–76 Southern Football League season was the 73rd in the history of the league, an English football competition.
Wimbledon won the championship, winning their second Southern League title in a row, whilst AP Leamington, Redditch United, Dartford and Minehead were all promoted to the Premier Division.
Six Southern League clubs applied to join the Football League at the end of the season, but none were successful.
The Premier Division consisted of 22 clubs, including 18 clubs from the previous season and four new clubs: Midway through the season Dunstable Town and Tonbridge folded, their records was transferred to the new clubs Dunstable and Tonbridge Angels respectively, with both clubs to be demoted to divisions One wherever they finish.
Alongside the four League clubs facing re-election, a total of nine non-League clubs applied for election, six of which were Southern League clubs.