The 1984 NCAA Division I baseball season, play of college baseball in the United States organized by the National Collegiate Athletic Association (NCAA) began in the spring of 1984. The season progressed through the regular season and concluded with the 1984 College World Series. The College World Series, held for the thirty eighth time in 1984, consisted of one team from each of eight regional competitions and was held in Omaha, Nebraska at Johnny Rosenblatt Stadium as a double-elimination tournament. Cal State Fullerton claimed the championship for the second time.