1998 Big 12 Conference baseball tournament

The 1998 Big 12 Conference baseball tournament was the second played in Big 12 history, and the first to be held at AT&T Bricktown Ballpark in Oklahoma City, OK from May 14 through 17. Texas Tech won the tournament and earned the Big 12 Conference's automatic bid to the 1998 NCAA Division I baseball tournament. The format followed that used by the NCAA Division I Baseball Championship at the time: a six-team, double-elimination tournament.

Regular season standings
Source:
 * Colorado did not sponsor a baseball team.

Tournament

 * Iowa State, Kansas, Kansas State, Nebraska, and Texas did not make the tournament.