... since the 1978-1979 season (AP All-Americans). This covers a 40-year span. I'm not including mixed players like Justin Jackson, Brook Lopez, Shane Battier, etc... North Carolina, Indiana, and Utah are states that have 2 schools with 4+ white All-Americans. Useless stat, I know. But kinda, sorta, slightly interesting. Gonzaga has 6 of them this century, which is on par with Duke for the same timeframe:
Duke: 10 (Luke Kennard, Grayson Allen, Mason Plumlee, Jon Scheyer, JJ Redick, Mike Dunleavy, Bobby Hurley, Christian Laettner, Danny Ferry, Mike Gminski)
Gonzaga: 6 (Kevin Pangos, Kyle Wiltjer, Kelly Olynyk, Adam Morrison, Blake Stepp, Dan Dickau)
Indiana: 5 (Cody Zeller, Kirk Haston, Brian Evans, Damon Bailey, Steve Alford)
Kansas: 5 (Jeff Withey, Cole Aldrich, Nick Collison, Kirk Hinrich, Raef LaFrentz)
Notre Dame: 5 (Ben Hansbrough, Luke Harangody, Troy Murphy, Pat Garrity, Kelly Tripucka)
UNC: 4 (Luke Maye, Tyler Zeller, Tyler Hansbrough, Montross)
Stanford: 4 (Casey Jacobsen, Mark Madsen, Adam Keefe, Todd Lichti)
Utah: 4 (Jakob Poetl, Andre Bogut, Keith Van Horn, Danny Vranes)
BYU: 4 (Jimmer Fredette, Michael Smith, Devin Durrant, Danny Ainge)
Duke: 10 (Luke Kennard, Grayson Allen, Mason Plumlee, Jon Scheyer, JJ Redick, Mike Dunleavy, Bobby Hurley, Christian Laettner, Danny Ferry, Mike Gminski)
Gonzaga: 6 (Kevin Pangos, Kyle Wiltjer, Kelly Olynyk, Adam Morrison, Blake Stepp, Dan Dickau)
Indiana: 5 (Cody Zeller, Kirk Haston, Brian Evans, Damon Bailey, Steve Alford)
Kansas: 5 (Jeff Withey, Cole Aldrich, Nick Collison, Kirk Hinrich, Raef LaFrentz)
Notre Dame: 5 (Ben Hansbrough, Luke Harangody, Troy Murphy, Pat Garrity, Kelly Tripucka)
UNC: 4 (Luke Maye, Tyler Zeller, Tyler Hansbrough, Montross)
Stanford: 4 (Casey Jacobsen, Mark Madsen, Adam Keefe, Todd Lichti)
Utah: 4 (Jakob Poetl, Andre Bogut, Keith Van Horn, Danny Vranes)
BYU: 4 (Jimmer Fredette, Michael Smith, Devin Durrant, Danny Ainge)