Alpha Gamma Omega is an American Christian fraternity. It was founded in 1927 at University of California, Los Angeles and now has chapters at universities in California, Colorado, North Carolina, Pennsylvania, and Virginia.
Alpha Delta Pi (ΑΔΠ), commonly known as ADPi, is an International Panhellenic sorority founded on May 15, 1851, at Wesleyan College in Macon, Georgia. It is the oldest secret society for women.
Alpha Chi Sigma (ΑΧΣ) is a professional fraternity specializing in the fields of the chemical sciences. It has both collegiate and professional chapters throughout the United States consisting of both men and women and numbering more than 78,000 members. The fraternity aims to bring together students and professionals pursuing a wide variety of chemistry-related careers.
Alpha Delta Phi is a North American Greek-letter social college fraternity. Alpha Delta Phi was originally founded as a literary society by Samuel Eells in 1832 at Hamilton College in Clinton, New York. Its more than 50,000 alumni include former presidents and senators of the United States, and justices of the Supreme Court.
Theta Chi (ΘΧ) is an international college fraternity. It was founded on April 10, 1856, at Norwich University then-located in Norwich, Vermont, and has initiated more than 200,000 members and currently has over 8,700 collegiate members across North America.
Sigma Pi (ΣΠ) is a collegiate fraternity with 232 chapters at American universities. As of 2021, the fraternity had more than 5,000 undergraduate members and over 118,000 alumni.
Acacia Fraternity, Inc. is a social fraternity founded in 1904 at the University of Michigan in Ann Arbor, Michigan. The fraternity has 27 active chapters and 3 associate chapters throughout Canada and the United States. The fraternity was founded by undergraduate Freemasons and was originally open only to men who had taken the Masonic obligations, but in 1933 the International Conclave elected to dispense with the Masonic prerequisite. In 1988, at the 45th Conclave, the fraternity elected to use "International" rather than "National" when referring to the fraternity.
Sigma Sigma Sigma (ΣΣΣ), also known as Tri Sigma, is a national American women's sorority.
Theta Kappa Nu (ΘΚΝ) fraternity was an American national collegiate fraternity founded in 1924 by delegates from eleven local fraternities. It merged with Lambda Chi Alpha in 1939.
Zeta Tau Alpha is an international women's fraternity founded on October 15, 1898 at the State Female Normal School in Farmville, Virginia. Its International Office is located in Carmel, Indiana. It is a member of the National Panhellenic Conference and currently has more than 300,000 initiated members.
Sigma Kappa is a sorority founded on November 9, 1874 at Colby College in Waterville, Maine.
Beta Sigma Psi National Lutheran Fraternity (ΒΣΨ), commonly known as Beta Sig, is a United States social organization for Lutheran college men. Founded at the University of Illinois in 1925, the fraternity has more than 7,500 initiated members. It has twelve chapters, primarily in the mid-west, and over 300 undergraduate members.
Phi Mu Delta (ΦΜΔ) is a national fraternity founded on March 1, 1918, at the Universities of Connecticut, New Hampshire, and Vermont. The fraternity is focused on the ideals of democracy, service, and brotherhood.
Chi Epsilon (ΧΕ) is an American collegiate civil engineering honor society. It honors engineering students who have exemplified the "principles of scholarship, character, practicality, and sociability...in the civil engineering profession." As of 2023, there are 141 chapters, of which 137 are active, where over 125,000 members have been inducted.
Tau Kappa Epsilon (ΤΚΕ), commonly known as ΤΚΕ or Teke, is a social college fraternity founded on January 10, 1899, at Illinois Wesleyan University. The organization has chapters throughout the United States and Canada, making the Fraternity an international organization. Since its founding in 1899, Tau Kappa Epsilon Fraternity has never had an exclusionary or discriminatory clause to prevent individuals from joining and has instead admitted members based on their "personal worth and character". As of spring 2024, there are 209 active ΤΚΕ chapters and colonies with over 301,000-lifetime members.
Gamma Iota Sigma (ΓΙΣ) is a collegiate professional fraternity, founded on April 16, 1966 at Ohio State University in Columbus, Ohio. It is an international professional fraternity organized to promote, encourage and sustain student interest in insurance, risk management, and actuarial science as professions. The fraternity was designed to be "the insurance industry's premier collegiate talent pipeline."
Pi Kappa Sigma was a national collegiate sorority operating in the United States from November 17, 1894, until it was absorbed by Sigma Kappa in 1959. Pi Kap was the first pedagogical sorority.
Trianon sorority was a national collegiate organization that operated in the United States from December 1929 to 1977.
Phi Mu Alpha Sinfonia (ΦΜΑ) is an American collegiate social fraternity for men with a special interest in music. The fraternity is open to men "who, through a love for music, can assist in the fulfillment of [its] object and ideals either by adopting music as a profession or by working to advance the cause of music in America." Phi Mu Alpha has initiated more than 260,000 members, known as Sinfonians, and the fraternity currently has over 7,000 active collegiate members in 249 collegiate chapters throughout the United States.
Sigma Delta Kappa (ΣΔΚ) was an American professional fraternity in the field of law. It was founded in 1914 at the University of Michigan Law School.
