Iota Omega chapter was founded at Carthage College in Kenosha, Wisconsin on April 23, 2005.
Zeta Eta chapter was founded at Bradley University in Peoria, Illinois on May 6, 1978.
Zeta Iota chapter was founded at Stanford University in Palo Alto, California on October 27, 1979. The chapter closed on May 1, 1982 and reopened on June 3, 2017.
Zeta Kappa chapter was founded at New Mexico State University in Las Cruces, New Mexico on November 10, 1979. The chapter closed on February 18, 1995.
Zeta Lambda chapter was founded at University of Virginia in Charlottesville, Virginia on April 19, 1980.
Zeta Mu chapter was founded at Dartmouth College in Hanover, New Hampshire on November 22, 1980. The chapter closed on March 20, 1990.
Zeta Nu chapter was founded at Texas A&M University in College Station, Texas on May 8, 1981.
Zeta Omega chapter was founded at Western Carolina University in Cullowhee, North Carolina on April 20, 1985.
Zeta Omicron chapter was founded at Vanderbilt University in Nashville, Tennessee on April 17, 1982.
Zeta Phi chapter was founded at Cornell University in Ithaca, New York on February 4, 1984.
Zeta Pi chapter was founded at Arizona State University in Tempe, Arizona on September 25, 1982.
Zeta Psi chapter was founded at Loyola University New Orleans in New Orleans, Louisiana on November 10, 1984.
Zeta Rho chapter was founded at Northwood University in Midland, Michigan on January 15, 1983.
Zeta Sigma chapter was founded at Missouri State University in Springfield, Missouri on April 15, 1983.
Zeta Tau chapter was founded at Villanova University in Villanova, Pennsylvania on June 25, 1983.
Zeta Theta chapter was founded at Brown University in Providence, Rhode Island on May 5, 1979.
Zeta Upsilon chapter was founded at Case Western Reserve University in Cleveland, Ohio on September 24, 1983.
Zeta Xi chapter was founded at University of North Carolina at Greensboro in Greensboro, North Carolina on March 20, 1982.
Delta Pi chapter was founded at University of Tennessee, Knoxville in Knoxville, Tennessee on October 21, 1961.
Delta Psi chapter was founded at University of California, Santa Barbara in Santa Barbara, California on December 4, 1965.
