Full-Fledged Chapters

 A  Berkeley, CA  Spring 1990
 Β  University of California, Davis  Spring 1990
 Γ  University of California, San Diego  Winter 1992
 Δ  University of California, Santa Cruz  Spring 1992
 Ε  University of California, Riverside  Summer 1992
 Ζ  Stanford University  Spring 1993
 Η  University of Texas, Austin  Fall 1993
 Θ  University of Pennsylvania  Fall 1994
 Ι  University of Houston  Fall 1994
 Κ  University of California, Irvine  Fall 1994
 Λ  University of Michigan, Ann Arbor  Winter 1996
 Μ  California State University, Sacramento  Spring 1996
 Ν  Pennsylvania State University  Fall 1994
 Ξ  San Jose, CA  Spring 1995
 Ο  California Polytechnic State University, San Luis Obispo  Spring 1996
 Π  University of Washington  Spring 1998
 Ρ  State University of New York, Buffalo  Spring 1997
 Σ  University of Virginia  Fall 1999
 T  Cornell University  Spring 1997
 Υ  University of Illinois, Urbana Champaign  Spring 2000

Associate Chapters

   Boston University  Spring 1996
   The Johns Hopkins University  Winter 1997
   Baylor University  Fall 1997
   New York, NY  Spring 1999
   University of Illinois, Chicago  Fall 1998
   State University of New York, Stony Brook  Winter 1999
   Rutgers University  Spring 2000
   University of California, Santa Barbara  Spring 2001
   University of North Carolina, Chapel Hill  Spring 1996
   The Florida State University  Spring 2001
   State University of New York, Binghamton  Spring 2003
   University of Oklahoma  Spring 2005
   University of South Florida  Spring 2006

Colonies

   Michigan State University  Fall 1998
   Virginia Polytechnic Institute and State University  Spring 2002
   University of Maryland, College Park  Fall 2002
   James Madison University  Spring 2003
   Purdue University at West Lafayette  Fall 2003
   Carnegie Mellon University  Fall 2003
   Queens, NY  Fall 2004
   Baltimore, MD  Fall 2005
   Duke University  Spring 2006
   Virginia Commonwealth University  Spring 2006
   University of Wisconsin, Madison  Spring 2008
   University of Florida  Fall 2008
   The City University of New York, Baruch College  Fall 2009
   University of Toronto  Winter 2010