Chapter information from the national website or Baird's Manual Online Archive. Active chapters and interest groups noted in bold, inactive chapters noted in italics. Column headers are sortable.[1][2]
^Baird's Manual Online notes the absorption of Alpha Pi Beta (local) to effect the re-establishment of the chapter in 1987.
^At its 1940 revival, the Beta chapter was created from Lambda Alpha Sigma (local), a group that dated from 1912.
^At its 1928 revival, the Delta chapter was created from Delta Tau (local), a group that dated from 1923.
^At its 1926 revival, the Lambda chapter was created from Phi Lambda Sigma (local), a group that dated from 1925.
^The Iota chapter was created from Delta Gamma Rho (local), a group that dated from 1920. At its 2010 revival another group named Beta Lambda Theta (local) and dating from 2003 was adopted to become the Iota chapter on the Emporia campus.
^The Kappa chapter was created from Alpha Kappa Gamma (local), a group that dated from 1922.
^The Sigma chapter was created from Tau Phi (local), a group that dated from 1921. At its later revival the group was established as a ΑΣΤ colony in 1979.
^The Eta chapter was created from Gamma Sigma Phi (local), a group that dated from 1926.
^The Nu chapter was created from Sigma Tau (local), a group that had formed prior to 1928.
^The Xi chapter was created from Omega Omega Omega (local), a group that dated from 1927.
^The Omicron chapter was created from Beta Theta (local), a group that dated from 1923.
^The Pi chapter was created from Rho Phi Gamma (local), a group that dated from 1928.
^The Rho chapter was created from Nu Nu Nu (local), a group that dated from 1928.
^The Zeta Tau chapter was created from Zeta Tau (local), a group that dated from 1926.
^The Upsilon chapter was created from Beta Phi Gamma (local), a group that dated from 1933.
^The Phi chapter was created from Zeta Gamma Alpha (local), a group that dated from 1931.
^The Chi chapter was created from a local group called the Teltrahs, dating from 1938.
^The Omega chapter was created from Delta Epsilon Phi (local), a group that dated from 1926.
^The Alpha Alpha chapter was created from Delta Sigma Alpha (local), a group that dated from 1926.
^The Alpha Beta chapter was created from Kappa Tau Phi (local), a group that dated from 1927.
^The Alpha Gamma chapter was created from Tau Alpha (local), a group that was formed in 1946.
^The Alpha Alpha chapter was created from a local group called the Penola Club), dating from 1930.
^The Alpha Epsilon chapter was created from Theta Xi Theta (local), a group that dated from 1949.
^The Alpha Lambda chapter was created from Lambda Sigma Pi (local), a group that dated from 1939.
^The Alpha Zeta chapter had originally formed as Epsilon Phi Sigma (local) in 1937.
^The Alpha Eta chapter had originally formed as the Alpha Philo society (local) in 1902.
^The Alpha Theta chapter had originally formed as Phi Gamma Nu (local) in 1931.
^The Alpha Omega chapter had originally formed as the Lambda chapter of Pi Alpha Tau in 1930. By about 1950 that small, Jewish national ceased to exist, sparking the CUNY, Brooklyn College group to choose a new name and operate as Sigma Tau Delta (local). The date of the name change is unknown. It then gathered a sister chapter at Syracuse, the former Mu chapter of Pi Alpha Tau, which had survived under a different local name. The two operated as a regional sorority. By 1960 the two groups opted to merge into Alpha Sigma Tau.
^The Alpha Iota chapter had originally formed as Pi Alpha Mu (local) in 1949. The naming convention strongly suggests it was in the process of becoming the Mu chapter of Pi Alpha Tau, a small national that would soon disband. After stabilizing as a local, it became part of a two-chapter group called Sigma Tau Delta ΣΤΔ, , banding with a CUNY Brooklyn chapter that had also been jettisoned from Pi Alpha Tau, and which had adopted the Sigma Tau Delta name. The two chapters joined as ΣΤΔ between 1950 and before 1960 - maybe officially in 1957. They both merged into Alpha Sigma Tau in 1960. Note that another sorority, Sigma Delta Tau evolved a few years prior to this time on the Syracuse campus, but the dates don't exactly match up and the predecessor at Syracuse for ΣΔΤ was a known local called Beta Chi Alpha - no connection.
^The Alpha Kappa chapter had originally formed as Pi Theta Gamma (local) in 1959.
^The Alpha Xi chapter was created from a local group called The Collegians, dating from 1961.
^The Alpha Omicron chapter had originally formed as Sigma Delta Phi (local) in 1930.
^ abcCalifornia, Edinboro, and Clarion Universities of Pennsylvania merged to become Pennsylvania Western University, "PennWest", with three campuses, in 2022.
^The Alpha Chi chapter had originally formed as Delta Pi Alpha (local) in 1961.
^The Alpha Upsilon chapter had originally formed as Phi Upsilon (local) in 1951.
^The Alpha Phi chapter was created from Sigma Kappa Rho (local), a group that dated from 1968.
^The Alpha Psi chapter was created from a very old group, Kappa Theta Psi (local), which had formed in 1906, making it older than all but two chapters of ΑΣΤ.
^The Beta Beta chapter had originally formed as Eta Iota (local) in 1968.
^The Beta Zeta chapter had originally formed as Alpha Sigma (local) in 1970, assumed with the intent of joining ΑΣΤ.
^The Beta Eta chapter was created from Kappa Alpha Mu (local), a group that dated from 1960.
^Named the Beta Tau chapter, slightly out of traditional alphabetization order, as this was the name of its predecessor local fraternity, established in 1969.
^The Beta Theta chapter was created from Sigma Tau (local), a group that dated from 1966.
^The Beta Iota chapter was created from Kappa Alpha Tau (local), a group that dated from 1968.
^The Beta Kappa chapter had originally formed as Phi Gamma Nu (local) in 1975.
^The Beta Nu chapter had originally formed as Tau Sigma Tau (local) in 1967.
^The Beta Rho chapter had originally formed as Sigma Xi Omega (local) in 1981.
^The Beta Phi chapter had originally formed as Beta Pi Gamma (local) in 1979.
^The Beta Psi chapter had originally formed as Theta Phi Theta (local) in 1972.
^The Gamma Alpha chapter had originally formed as Zeta Theta Chi (local) in 1959.
^The Gamma Zeta chapter had originally formed as Lambda Phi Delta (local) in 1969.
^The Texas satellite branch of this school, a multi-campus international organization with its headquarters in Michigan, effectively closed to undergrads with cessation of residential housing in 2014. It continues to provide adult degree and graduate programs in Texas.
^The Gamma Eta chapter had originally formed as Sigma Tau (local) in 1981.
^The Gamma Iota chapter had originally formed as Sigma Delta Rho (local) in 1981.
^The Gamma Chi chapter had originally formed as Gamma Chi (local) in 1965, and was given this name slightly out the normal alphabetization sequence.
^The Gamma Lambda chapter had originally formed as Sigma Tau Omega (local) in 1984.
^The Gamma Xi chapter had originally formed as Zeta Delta Chi (local) in 1985.
^The Gamma Rho chapter had originally formed as the Little Sisters of Sigma Tau Gamma on its campus, dating from the 1970s.
^The Gamma Phi chapter had originally formed as Xi Lambda Phi (local) in 1990.
^The Delta Alpha chapter had originally formed as Lambda Delta Pi (local) in 1986.
^The Delta Beta chapter had originally formed as Chi Sigma Nu (local) prior to 1993.
^The Delta Gamma chapter had originally formed as Theta Kappa (local) in 1969.
^The Delta Delta chapter had originally formed as Gamma Gamma Gamma (local) in the 1970s.
^The Delta Zeta chapter had originally formed as Phi Kappa Tau (local) prior to 1995.
^The Delta Eta chapter had originally formed as Delta Phi Omega (local) in 1987.
^The Delta Theta chapter is quite old, having originally formed as Phi Mu Epsilon (local) in 1912.
^The Delta Iota chapter had originally formed as Kappa Phi (local) prior to 1997.
^The Delta Lambda chapter had originally formed as The Alpha Club (local) in 1996.
^The Delta Xi chapter had originally formed as Delta Phi Kappa (local) in 1986.
^The Delta Omicron chapter had originally formed as Sigma Phi Delta (local) in 1971.
^The Delta Rho chapter had originally formed as The F.S.C. Club (local) in 1998.
^ abUniversity of the Sciences merged into Saint Joseph's University in 2022.
^The Delta Sigma chapter had originally formed as The U.P.S. Club (local) in 1998.
^The Delta Tau chapter had originally formed as Alpha Kappa Sigma (local) in 1991.
^The Delta Upsilon chapter had originally formed as Alpha Sigma (local) in 1997, assumed with the intent of joining ΑΣΤ.
^The Delta Phi chapter had originally formed as Gamma Delta (local) in 1979.
^The Delta Chi chapter had originally formed as Gamma Phi (local) in 1998.
^ abThe Colorado and Miami branches of Johnson & Wales University closed in 2021.
^The Delta Omega chapter had originally formed as Omega Delta (local) in 1989, probably given its chapter name by ΑΣΤ to mark the original group.
^The Epsilon Kappa chapter had originally formed as a chapter of professional sorority Alpha Omega Epsilon in 1999. It had a brief closure between 2002–2004 and petitioned to join ΑΣΤ in 2009.
^The Epsilon Mu chapter had originally formed as Kappa Phi Epsilon (local) in 1999.
^The Epsilon Nu chapter had originally formed as Alpha Nu Omega (local) in 1979.
^The Epsilon Pi chapter had originally formed as Lambda Chi (local) sometime before 2013.
^The Epsilon Rho chapter had originally formed as Phi Eta Psi (local) in 1994.
^The Epsilon Tau chapter had originally formed as Kappa Sigma Alpha (local) in 2012.
^"Find a Chapter". Alpha Sigma Tau. 2015-11-30. Retrieved 2023-05-12.
^A Greekchat note listing ΑΣΤ chapters, says that the Longwood chapter would have used the Tau designation had it not been granted Zeta Tau as a chapter name. Later, Tau would become one of three first series chapter names that remained unused.