The 1991–92 Southern Football League season was the 89th in the history of the league, an English football competition.
Bromsgrove Rovers won the Premier Division to earned promotion to the Football Conference. Wealdstone, Poole Town, Fisher Athletic (who had just been relegated from the Conference) and Gravesend & Northfleet were all relegated from the Premier Division, whilst Solihull Borough (in their first season in the Southern League), Hastings Town, Hednesford Town and Weymouth were all promoted to the Premier Division, the former two as champions. Only two clubs, Alvechurch and Gosport Borough, were relegated from the Southern League, whilst Hythe Town folded and Rushden Town merged with United Counties League club Irthlingborough Diamonds to form Rushden & Diamonds.
The Premier Division consisted of 22 clubs, including 19 clubs from the previous season and three new clubs:
| Competition: | Southern Football League Premier Division |
| Season: | 1991–92 |
| Winners: | Bromsgrove Rovers |
| Promoted: | Bromsgrove Rovers |
| Relegated: | Fisher Athletic Gravesend & Northfleet Poole Town Wealdstone |
| Matches: | 462 |
| Total Goals: | 1320 |
| Prevseason: | 1990–91 |
| Nextseason: | 1992–93 |
The Midland Division consisted of 22 clubs, including 19 clubs from the previous season and three new clubs:
At the end of the season Stroud reverted name to Forest Green Rovers, while Rushden Town merged into new club Irthlingborough Diamonds, who took over place in the Midland Division.
| Competition: | Southern Football League Midland Division |
| Season: | 1991–92 |
| Winners: | Solihull Borough |
| Promoted: | Hednesford Town Solihull Borough |
| Relegated: | Alvechurch |
| Matches: | 462 |
| Total Goals: | 1436 |
| Prevseason: | 1990–91 |
| Nextseason: | 1992–93 |
The Southern Division consisted of 22 clubs, including 18 clubs from the previous season and four new clubs:
| Competition: | Southern Football League Southern Division |
| Season: | 1991–92 |
| Winners: | Hastings Town |
| Promoted: | Hastings Town Weymouth |
| Relegated: | Gosport Borough |
| Matches: | 462 |
| Total Goals: | 1297 |
| Prevseason: | 1990–91 |
| Nextseason: | 1992–93 |