Alpha Gamma Delta (ΑΓΔ), also known as Alpha Gam, is an international women's fraternity and social organization. It was founded on May 30, 1904, by eleven female students at Syracuse University in Syracuse, New York, and thus it is the youngest member of the Syracuse Triad of North American social sororities that also includes Gamma Phi Beta (1874) and Alpha Phi (1872). Since its founding, Alpha Gamma Delta has, as of December 2021, initiated over 201,000 members and installed 199 collegiate chapters and more than 250 alumnae groups.
Pi Kappa Alpha (ΠΚΑ), commonly known as Pike is a college fraternity founded at the University of Virginia in 1868. The fraternity has over 225 chapters and provisional chapters across the United States and abroad with over 15,500 undergraduate members and over 300,000 lifetime initiates.
Phi Delta Theta (ΦΔΘ), commonly known as Phi Delt, is an international secret and social fraternity founded in 1848, and currently headquartered, at Miami University in Oxford, Ohio. Phi Delta Theta, along with Beta Theta Pi and Sigma Chi form the Miami Triad. The fraternity has over 200 active chapters and colonies in over 44 U.S. states and five Canadian provinces and has initiated more than 310,000 men between 1848 and 2024. There are over 180,000 living alumni. Phi Delta Theta chartered house corporations own more than 135 houses valued at over $141 million as of summer 2015. There are nearly 100 recognized alumni clubs across the U.S. and Canada.
Delta Upsilon (ΔΥ), commonly known as DU, is a collegiate men's fraternity founded on November 4, 1834, at Williams College in Williamstown, Massachusetts. It is the sixth-oldest, all-male, college Greek-letter organization founded in North America. It is popularly and informally known as "DU" or "Delta U" and its members are called "DUs". Although historically found on the campuses of small New England private universities, Delta Upsilon currently has 76 chapters/colonies across the United States and Canada. A number of its buildings are listed on the National Register of Historic Places.
Gamma Theta Upsilon is an international honor society in geography. It was established in 1928 as a professional fraternity at Illinois State University and became international in 1969. Gamma Theta Upsilon is a member of Association of College Honor Societies.
Latino America Unida, Lambda Alpha Upsilon Fraternity, Inc. is a Latino oriented Greek letter intercollegiate fraternity founded on December 10, 1985, at the State University of New York at Buffalo. In 1998, it became the first East Coast based fraternity to join the majority West Coast and Mid-West based conference of the National Association of Latino Fraternal Organizations (NALFO) instead of the majority East Coast based ConcÌlio Nacional de Hermandades Latinas.
Theta Upsilon Omega (ΘΥΩ), was a national collegiate fraternity in the United States. It was formed by the merger of nine local fraternities in 1924. On April 23, 1938, Theta Upsilon Omega merged with Sigma Phi Epsilon.
Phi Alpha Gamma (ΦΑΓ) was a professional fraternity for homeopathic medicine founded at the New York Homeopathic Medical College in 1894. Once the largest medical fraternity in the United States, It merged with Phi Chi in 1948.
The North American fraternity and sorority system began with students who wanted to meet secretly, usually for discussions and debates not thought appropriate by the faculty of their schools. Today they are used as social, professional, and honorary groups that promote varied combinations of community service, leadership, and academic achievement.
Theta Upsilon (ΘΥ) was a national women's fraternity operating in the United States from February 1921 until May 1962, when the group was absorbed by the Delta Zeta sorority.
Omega Upsilon Phi (ΩΥΦ) was a professional medical fraternity founded at the University at Buffalo in 1894. It merged with Phi Beta Pi in 1934.
Psi Omega (ΨΩ) is an international professional fraternity for Dentistry. It was founded on June 8, 1892, "to maintain the standards of the profession, to encourage scientific investigation and literary culture." Psi Omega is the third professional dental fraternity to be formed, following Delta Sigma Delta (1882) and Xi Psi Phi (1889), and pre-dating Alpha Omega (1907). Psi Omega has 27 active chapters.
Delta Psi (ΔΨ) was a local fraternity at the University of Vermont that was associated with the early history of Delta Upsilon. It was active from 1850 until approximately 2000.
Fraternities and sororities at the University of Virginia include the collegiate organizations on the grounds of the University of Virginia in Charlottesville, Virginia. First founded in the 1850s with the establishment of several fraternities, the system has since expanded to include sororities, professional organizations, service fraternities, honor fraternities, and cultural organizations. Fraternities and sororities have been significant to the history of the University of Virginia, including the founding of two national fraternities Kappa Sigma (ΚΣ) and Pi Kappa Alpha (ΠΚΑ).
Theta Sigma Upsilon (ΘΣΥ) was an American sorority founded on March 25, 1921 at Emporia State University. It chartered 23 chapters in the United States. The sorority merged with Alpha Gamma Delta on June 29, 1959.
Phi Alpha (ΦΑ) was an American historically Jewish fraternity founded in 1914. It merged with Phi Sigma Delta in 1959. Ten years later, that fraternity merged with Zeta Beta Tau.
Omicron Alpha Tau (ΟΑΤ) was an historically Jewish fraternity founded in 1912. It merged with Tau Delta Phi in 1934.
), Canada ( 
), United Kingdom ( 
), Colombia ( 
), Sweden ( 
), Ethiopia ( 
), and Japan ( 
). Three persons in the following list - Charles Dawes, Charles Evans Hughes, and John Arthur Clark - have served as the international president of the Delta Upsilon fraternity.
