The 1973–74 Southern Football League season was the 71st in the history of the league, an English football competition.
Dartford won the championship, winning their third Southern League title, whilst Burton Albion, Stourbridge, Bath City and Wealdstone 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:
At the end of the season Guildford City, who lost its ground earlier, merged with Dorking to form a new club Guildford & Dorking United. Also, Folkestone was renamed Folkestone and Shepway.
| Competition: | Southern Football League Premier Division |
| Season: | 1973–74 |
| Winners: | Dartford |
| Relegated: | Bedford Town Folkestone Hillingdon Borough Worcester City |
| Matches: | 462 |
| Total Goals: | 1149 |
| Prevseason: | 1972–73 |
| Nextseason: | 1974–75 |
Division One North consisted of 22 clubs, including 18 clubs from the previous season and four new clubs:
Also, at the end of the previous season Lockheed Leamington was renamed AP Leamington.
At the end of the season Bletchley Town was renamed Milton Keynes City.
| Competition: | Southern Football League Division One North |
| Season: | 1973–74 |
| Winners: | Stourbridge |
| Promoted: | Burton Albion Stourbridge |
| Matches: | 462 |
| Total Goals: | 1332 |
| Prevseason: | 1972–73 |
| Nextseason: | 1974–75 |
Division One North consisted of 20 clubs, including 17 clubs from the previous season and three new clubs, relegated from the Premier Division:
| Competition: | Southern Football League Division One South |
| Season: | 1973–74 |
| Winners: | Wealdstone |
| Promoted: | Bath City Wealdstone |
| Matches: | 380 |
| Total Goals: | 996 |
| Prevseason: | 1972–73 |
| Nextseason: | 1974–75 |
Alongside the four League clubs facing re-election, a total of seven non-League clubs applied for election, six of which were Southern League clubs. All the League clubs were re-elected.[1]