1991 Southwest Conference baseball tournament

The 1991 Southwest Conference baseball tournament was the league's annual postseason tournament used to determine the Southwest Conference's (SWC) automatic bid to the 1991 NCAA Division I baseball tournament. The tournament was held from May 16 through 18 at Olsen Field on the campus of Texas A&M University in College Station, Texas.

The number 1 seed went 3–0 to win the team's 10th SWC tournament under head coach Cliff Gustafson.

Format and seeding
The tournament featured the top four finishers of the SWC's 8 teams in a double-elimination tournament.