| Club: | Southampton F.C. |
| Season: | 1983–84 |
| Manager: | Lawrie McMenemy |
| Stadium: | The Dell |
| League: | First Division |
| League Result: | 2nd |
| Cup1: | FA Cup |
| Cup1 Result: | Semi-finals |
| Cup2: | League Cup |
| Cup2 Result: | Third round |
| League Topscorer: | Steve Moran (21) |
| Season Topscorer: | Steve Moran (25) |
| Pattern La1: | _whitelower |
| Pattern B1: | _redsides_2 |
| Pattern Ra1: | _whitelower |
| Pattern Sh1: | _whitesides |
| Leftarm1: | ff0000 |
| Rightarm1: | ff0000 |
| Shorts1: | 000000 |
| Prevseason: | 1982–83 |
| Nextseason: | 1984–85 |
During the 1983–84 English football season, Southampton competed in the Football League First Division.
Southampton enjoyed their best season ever, achieving their highest-ever finish in the Football League of second, three points behind champions Liverpool. They also reached the FA Cup semifinal, only to be beaten by Everton.