Dungannon said:
The Pac-10 has the most National Championships in Men's Basketball with 15.
Yup. Going by NCAA tournament titles (definitive now; there was a time when the NIT was more prestigous than the NCAAs)...
The Big Ten has, oddly, 10.
Assuming Kentucky was always in the SEC, SEC schools have 9 (the only non-Kentucky titles are recent).
The ACC has 6.
The Big East has 5; current Big East members who weren't in the Big East at the time add another 5.
The Big 12 actually has none; Kansas and Oklahoma State each won two titles as part of the Big 6/7/8.
Current Mountain West teams have 3 titles, though 2 were probably pre-WAC, and the other was pre-MWC.
Which leaves the titles won by Holy Cross (1947), CCNY (1950), La Salle (1954), San Fransisco (1955-1956), Loyola Ill. (1963), and UTEP (1966).