Ball Diamond is a baseball venue located on the campus of Ball State University in Muncie, Indiana, United States. It is part of the First Merchants Ballpark Complex, which also encompasses a softball field. It is home to the Ball State Cardinals baseball team, a member of the Division I Mid-American Conference. The field has a capacity of 1,700 people. Recent renovations to the field have added a new backstop, public address system, fencing, and video scoreboard.

Ball Diamond first opened in 1971. In 1993, a softball field opened nearby. Between 2014 and 2016, Ball Diamond underwent renovations, which included the installation of a FieldTurf surface. The softball field also was renovated at this time. In 2016, the baseball/softball complex was named the First Merchants Ballpark Complex after the First Merchants Corporation, a banking corporation headquartered in Muncie.

• List of NCAA Division I baseball venues