| Year: | 2003 |
| Conference: | SEC |
| Gender: | Men's |
| Teams: | 11 |
| Arena: | Louisiana Superdome |
| City: | New Orleans, Louisiana |
| Champions: | Kentucky |
| Titlecount: | 25th |
| Coach: | Tubby Smith |
| Coachcount: | 4th |
| Mvp: | Keith Bogans, Kentucky |
| Attendance: | 172,840 |
The 2003 SEC men's basketball tournament took place on March 13–16, 2003 in New Orleans at the Louisiana Superdome. Georgia did not participate; it had pulled out of the postseason as NCAA violations by coach Jim Harrick were emerging.
As shown in the bracket below, the designated berth for the Eastern division's sixth-seeded team was instead given to a Western division team, while the designated berth for the Western division's sixth-seeded team was left vacant.
Kentucky won the tournament and received the SEC's automatic bid to the NCAA tournament by beating Mississippi State on March 16, 2003.