1978 Southwest Conference baseball tournament

The 1978 Southwest Conference baseball tournament was the league's annual postseason tournament used to determine the Southwest Conference's (SWC) automatic bid to the 1978 NCAA Division I baseball tournament. The tournament was held from May 12 through 14 at Disch–Falk Field on the campus of The University of Texas in Austin, Texas.

The number 3 seed went 3–0 to win the team's second SWC tournament under head coach Mickey Sullivan.

Format and seeding
The tournament featured the top four finishers of the SWC's 9 teams in a double-elimination tournament.