The closest that any campus comes to having all NPC groups is Penn State with 21 of the 26.
Here is a list of the 26 groups. If you want links to their web pages, visit
http://panhellenic.tripod.com/FAQ.html or
http://www.npcwomen.org/memorg.htm
The twenty-six member organizations of the National Panhellenic Conference are listed below with their entrance date into NPC. Chairmanship rotation within NPC is based upon the date of entrance into the Conference.
Pi Beta Phi - 1902
Kappa Alpha Theta - 1902
Kappa Kappa Gamma - 1902
Alpha Phi - 1902
Delta Gamma - 1902
Gamma Phi Beta - 1902
Alpha Chi Omega - 1903
Delta Delta Delta - 1902
Alpha Xi Delta - 1904
Chi Omega - 1903
Sigma Kappa - 1905
Alpha Omicron Pi - 1905
Zeta Tau Alpha - 1909
Alpha Gamma Delta - 1909
Alpha Delta Pi - 1909
Delta Zeta - 1910
Phi Mu - 1911
Kappa Delta - 1912
Sigma Sigma Sigma - 1951
Alpha Sigma Tau - 1951
Alpha Sigma Alpha - 1951
Alpha Epsilon Phi - 1951
Theta Phi Alpha - 1951
Phi Sigma Sigma - 1951
Delta Phi Epsilon - 1951
Sigma Delta Tau - 1951