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North Carolina has won 18 ACC Tournament Championships and 31 regular season titles.
11 total North Carolina 5 Duke 3 North Carolina state 2 Maryland 1
Assuming you mean football..FSU has won/shared 12 ACC championships.
The South Carolina Gamecocks left the Atlantic Coast Conference after the 1970 season where they became independent until they joined the Southeastern Conference Eastern Division in 1992.
At the end of the 2009 season, the Gamecocks stood at 535-535-44.
Clemson has one ACC tournament title.
North Carolina, Duke, NC State and Maryland
North Carolina leads with 25 ACC Tournament Championships and 34 regular season titles. Duke has 23 ACC Tournament Championships and 22 regular season titles. Duke has won 19 ACC Men's titles, UNC has won 17. UNC has 9 Women's titles, Duke 8. Total titles: Duke 27, UNC, 26.
Duke has 23 ACC Tournament Championships and 22 regular season titles.
Duke 1991, 1992, 1999 North Carolina 1957, 1982, 1993, 2005 North Carolina State 1974, 1983 Maryland 2002
21
One in 1990.