ACC athletic directors passed the proposal Wednesday at the conference's annual spring meetings. It goes into effect this fall.
Conference schools already were limited to 72 players for the ACC championship football game. Other BCS conferences with title games have a 72-player limit.
ACC associate commissioner for football Michael Kelly said the roster cap did not apply to non-conference away games. For example, when Florida State plays at Florida or Clemson plays at South Carolina, the roster size "is at the coach's discretion," he said.
The conference also awarded its baseball tournament to Myrtle Beach, S.C., for three years, beginning in 2011. Myrtle Beach beat out Jacksonville, Greensboro, N.C., Greenville, N.C., and Winston-Salem, N.C. The tournament will be played at BB&T Coastal Stadium, the Carolina League home of the Myrtle Beach Pelicans, an Atlanta Braves farm team.