Pi Delta Psi was founded at Binghmaton University in NY State.
Other organizations founded at Binghamton:
Sigma Lambda Upsilon (LGLO)
Iota Nu Delta (AGLO)
Phi Theta Chi (LGLO)
Kappa Phi Lambda (AGLO)
Just to give some Alpha Chapters of BGLOs, LGLOs, and AGLOs:
BGLOs:
Alpha Phi Alpha - Cornell University
Alpha Kappa Alpha - Howard University
Delta Sigma Theta - Howard University
Zeta Phi Beta - Howard University
Iota Phi Theta - Morgan State University
Kappa Alpha Psi - Indiana University
Sigma Gamma Rho - Butler University
Phi Beta Sigma - Howard University
Omega Psi Phi - Howard University
LGLOs:
Lambda Upsilon Lambda - Cornell University
Lambda Pi Chi - Cornell University
Omega Phi Beta - SUNY Albany
Phi Iota Alpha - Rensselaer Polytechnic Institute (RPI)
Lambda Theta Alpha - Kean University
AGLOs:
Pi Alpha Phi - UC Berkley
Nu Alpha Phi - SUNY Albany
Lambda Phi Epsilon - UCLA
alpha Kappa Delta Phi - UC Berkley
Sigma Psi Zeta - SUNY Albany
Sigma Omicron Pi - UC Berkley
Delta Kappa Delta - Texas A&M
Sigma Beta Rho - University of Pennsylvania
Delta Phi Omega - University of Houston
As you can see New York State is the one of the birthplaces of Greeks. That, and California.
