Gamma Nu chapter was founded at San Diego State University in San Diego, California on November 18, 1950.
Beta Rho chapter was founded at American University in Washington, D.C. on June 3, 1937.
Beta Sigma chapter was founded at University of Georgia in Athens, Georgia on January 7, 1938.
Beta Tau chapter was founded at Miami University in Oxford, Ohio on December 13, 1941.
Beta Theta chapter was founded at Lawrence University in Appleton, Wisconsin on February 20, 1930. The chapter closed on May 28, 1980.
Beta Upsilon chapter was founded at Duke University in Durham, North Carolina on January 31, 1942. The chapter closed on January 22, 1976.
Beta Xi chapter was founded at Utah State University in Logan, Utah on May 19, 1934.
Beta Zeta chapter was founded at Whitman College in Walla Walla, Washington on November 9, 1928. The chapter closed on September 9, 1983.
Chi chapter was founded at Oregon State University in Corvallis, Oregon on March 19, 1915.
Delta chapter was founded at Allegheny College in Meadville, Pennsylvania on January 29, 1891.
Delta Chi chapter was founded at William Woods University in Fulton, Missouri on November 20, 1965.
Delta Epsilon chapter was founded at Southeast Missouri State University in Cape Girardeau, Missouri on April 26, 1958.
Delta Eta chapter was founded at Queens College in Queens, New York on March 7, 1959. The chapter closed on June 1, 1965.
Delta Iota chapter was founded at Emory University in Atlanta, Georgia on May 9, 1959. The chapter closed on January 29, 1988.
Delta Kappa chapter was founded at Sam Houston State University in Huntsville, Texas on September 6, 1959.
Delta Lambda chapter was founded at Ripon College in Ripon, Wisconsin on October 31, 1959.
Delta Mu chapter was founded at University of Massachusetts in Amherst, Massachusetts on February 18, 1961.
Delta Nu chapter was founded at Iowa State University in Ames, Iowa on March 18, 1961.
Delta Omega chapter was founded at University of Kentucky in Lexington, Kentucky on March 26, 1966. The chapter closed on March 10, 1976 and was reopened on November 7, 2015.
Delta Omicron chapter was founded at Portland State University in Portland, Oregon on May 13, 1961.
