The 2015 NCAA Division I baseball tournament began on Friday, May 29, 2015, as part of the 2015 NCAA Division I baseball season. The 64-team double-elimination tournament concluded with the 2015 College World Series in Omaha, Nebraska, which began on June 13 and ended on June 24 with the Virginia Cavaliers upsetting the defending champion Vanderbilt Commodores 4–2 in the decisive Game 3 and thereby avenging their CWS Finals loss to Vanderbilt the previous year.

The College World Series (CWS), officially the NCAA Men's College World Series (MCWS), is a baseball tournament held each June in Omaha, Nebraska. The MCWS is the culmination of the National Collegiate Athletic Association (NCAA) Division I Baseball Championship tournament—featuring 64 teams in the first round—which determines the NCAA Division I college baseball champion. The eight participating teams are split into two, four-team, double-elimination brackets, with the winners of each bracket playing in a best-of-three championship series.