Dartmouth College is host to many fraternities and sororities, and a significant percentage of the undergraduate student body is active in Greek life. In 2005, the school stated that 1,785 students were members of a fraternity, sorority, or gender-inclusive Greek house, comprising about 43 percent of all students, or about 60 percent of the eligible student body. Greek organizations at Dartmouth provide both social and residential opportunities for students and are the only single-sex residential option on campus. Greek organizations at Dartmouth do not provide dining options, as regular meal service has been banned in Greek houses since 1909.
Theta Xi (ΘΞ) is a North American Greek-letter social college fraternity. It was founded at Rensselaer Polytechnic Institute (RPI) on April 29, 1864. Of all the social fraternities today, Theta Xi was the only one founded during the Civil War. Its Grand Lodge is headquartered in downtown Atlanta. Since its inception, Theta Xi has grown to include more than 60,000 initiated members. Currently, there are approximately 45 active chapters, and 1 colony. The Theta Xi Fraternity Chapter House at Rensselaer Polytechnic Institute is listed on the National Register of Historic Places.
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.
Theta Phi Alpha (ΘΦΑ), commonly known as Theta Phi, is a women's fraternity founded at the University of Michigan – Ann Arbor on August 30, 1912. Theta Phi Alpha is one of 26 national sororities recognized in the National Panhellenic Conference. Today, Theta Phi Alpha has 54 active chapters across the United States. Theta Phi has alumnae clubs and associations in almost every major city. The organization is involved in the philanthropies Glenmary Home Missioners and The House that Theta Phi Alpha Built which help the homeless and underprivileged, specifically in the Appalachian Mountain region, and Camp Friendship, a summer camp in northeast Mississippi for children from disadvantaged and low-income homes.
While the traditional social fraternity is a well-established mainstay across the United States at institutions of higher learning, alternatives – in the form of social fraternities that require doctrinal and behavioral conformity to the Christian faith – developed in the early 20th century. They continue to grow in size and popularity.
The Order of Barristers is an honor society for United States law school graduates. Membership in The Order of Barristers is limited to graduating law students and practicing lawyers who demonstrate exceptional skill in trial advocacy, oral advocacy, and brief writing. The Order of Barristers seeks to improve these programs through interscholastic sharing of ideas, information, and resources. The Order is highly selective and provides national recognition to the top advocates at their respective law schools.
Sigma Theta Epsilon (ΣΘΕ) was an American interdenominational national Christian fraternal organization that operated from 1925 to 2022. It had 47 chapters across the United States.
Theta Kappa Psi Medical Fraternity, Incorporated, (ΘΚΨ) is a North American professional medical fraternity. As of 2023, it operates as an independent local fraternity with one active chapter.
The Zeta Phi Society (ΖΦ) was a fraternal organization founded in 1870 at the University of Missouri. The Alpha chapter of the society became a chapter of Beta Theta Pi in 1890. The Missouri unit is the oldest fraternity in continuous existence at the university and the second fraternity founded west of the Mississippi River. Its second chapter, Sigma chapter joined Phi Gamma Delta in 1886. Zeta Phi Society's other two units disbanded.
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.
The Association for Women in Communications (AWC) is an American professional organization for women in the communications industry. It was formed as Theta Sigma Phi in 1909 at the University of Washington.
Kappa Sigma Kappa (ΚΣΚ) is the name of three separate college fraternities, sharing a common history and traditions but disconnected by decades and a break in organizational continuity. The original incarnation of Kappa Sigma Kappa was formed at Virginia Military Institute on September 28, 1867. Most of its active chapters merged into Phi Delta Theta in 1886.
Phi Kappa (ΦΚ) was an American social fraternity founded on October 1, 1889 by a group of Catholic students at Brown University who were refused entrance to other fraternities because of their faith. On April 29, 1959, Phi Kappa merged with a similar fraternity Theta Kappa Phi to form Phi Kappa Theta.
Delta Psi Kappa (ΔΨΚ) was an American professional fraternity for women in the disciplines of health and physical education, health sciences, and recreation that was established in 1916.
