Dartmouth College fraternities and sororities

Dartmouth College is host to many fraternities and sororities, and a significant percentage of the undergraduate student body is active in Greek life. In the fall of 2022, 35 percent of male students belonged to a fraternity, and 36 percent of students belonged to a sorority. 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.

Social fraternities at Dartmouth College grew out of a tradition of student literary societies that began in the late eighteenth and early nineteenth centuries. The first social fraternities were founded in 1842 and rapidly expanded to include the active participation of over half of the student body. Fraternities at Dartmouth built dedicated residence and meeting halls in the early 1900s and 1920s, and then struggled to survive the lean years of the 1930s. Dartmouth College was among the first higher education institutions to desegregate fraternity houses in the 1950s and was involved in the movement to create coeducational Greek houses in the 1970s. Sororities were introduced to campus in 1977.

As of 2025, Dartmouth College extends official recognition to fifteen all-male fraternities, eleven all-female sororities, and three gender-inclusive Greek houses. The Greek houses are largely governed through three independent councils, the Interfraternity Council, the Inter-Sorority Council, and the Gender-Inclusive Greek Council. Dartmouth College has three cultural interest fraternities and three cultural interest sororities, which are governed through two additional councils: the National Pan-Hellenic Council and the Multicultural Greek Council. A chapter of the Phi Beta Kappa honor society is active, but there are no active professional fraternity chapters at Dartmouth College.

Social fraternities at Dartmouth College grew out of a tradition of student literary societies that began in the late eighteenth and early nineteenth centuries. The first such society at Dartmouth, the Social Friends, was formed in 1783. A rival organization, called the United Fraternity, was founded in 1786. A chapter of Phi Beta Kappa was established at Dartmouth in 1787, and counted among its members Daniel Webster, class of 1801. These organizations were, in large part, the only social life available to students at the college. The organizations hosted debates on a variety of topics not encountered in the curriculum of the day and amassed large libraries of titles not found in the official College library. Both Social Friends and the United Fraternity created libraries in Dartmouth Hall and met in a room called Society Hall inside Dartmouth Hall. In 1815, the college intervened in the hotly contested recruitment battle between the Social Friends and the United Fraternity by restricting each society to recruit only from separate halves of the new student class. In 1825, the college began simply assigning new students to one society or the other. Interest in the literary societies declined in the 1830s and 1840s. The college library and instructional curriculum had expanded to include much of what the literary societies had supported, and new Greek letter societies began to appear on campus.

In 1841, two factions of the United Fraternity split off from the literary society. One of the new societies called itself Omega Phi and on May 10, 1842, obtained a charter as the Zeta chapter of Psi Upsilon. The other faction to split from the United Fraternity organized itself on July 13, 1842, as Kappa Kappa Kappa, a local fraternity. More Greek organizations were founded, and by 1855, 64% of students, mostly upperclassmen, were members of the Greek letter societies on campus. Initially, the original Greek letter societies would not extend invitations to membership to first-year students. Two Greek letter organizations were created exclusively for freshmen: Kappa Sigma Epsilon and Delta Kappa. These societies would dissolve in 1883 when the fraternities of the upper classes began to pledge freshmen. A chapter of Phi Beta Kappa survived at Dartmouth, but by the 1830s had established its role as a strictly literary society by dropping requirements of secrecy for membership and activities. The new, social Greek organizations distinguished themselves from Phi Beta Kappa and the previous literary societies in several ways. The new fraternities were self-selective and exclusive. Each organization developed its own secret rituals and procedures. Most societies began to invest in creating their meeting halls, either upstairs rooms in buildings on Main Street or free-standing structures near campus. There were eleven active Greek organizations at Dartmouth College in 1900.

The fortunes of the fraternity system at Dartmouth followed a boom and bust pattern in the early twentieth century. Several organizations purchased frame houses or built their own between 1898 and 1907, including Beta Theta Pi, Kappa Kappa Kappa, Phi Delta Alpha, Psi Upsilon, and Delta Tau Delta. The economic expansion of the 1920s created a boom in the fortunes of the fraternities, allowing many to build new brick residences near campus, including Zeta Psi, Kappa Kappa Kappa, Phi Sigma Kappa, Sigma Nu, Sigma Alpha Epsilon, Chi Phi, Theta Delta Chi, Phi Gamma Delta, Sigma Chi, and Gamma Delta Chi. It was during this period that Webster Avenue developed as "fraternity row". The new residences were built without significant dining facilities, as the Trustees of the college had banned fraternities from serving regular meals in their chapter houses and had limited the number of resident brothers by the fall semester of 1909. College administrators also challenged the fraternities to become more engaged in College life and less focused on their fraternity life during this time. College President Ernest Martin Hopkins personally decided to abolish freshman rush in 1924.

As did the nation, fraternities at Dartmouth went through difficult times during the Great Depression. The decade of the 1930s saw almost no building projects at all in the fraternity system, and many houses could no longer afford regular maintenance. One of the great tragedies at Dartmouth College occurred on a winter night in 1934 when nine members of Theta Chi died from carbon monoxide poisoning after a metal chimney on a dilapidated coal furnace in the basement of the chapter house broke in the night. In 1935, Dartmouth historian and professor Leon Burr Richardson asserted in a survey that, in light of the national suffering, the fraternity chapters should ask themselves if they had "any excuse for existence." Four fraternities dissolved during the Great Depression (Alpha Sigma Phi, Alpha Tau Omega, Lambda Chi Alpha, and Sigma Alpha Mu), and two (Phi Kappa Sigma and Alpha Chi Rho) merged to pool scarce resources to survive. All of the surviving fraternities closed for the duration of World War II, as the campus was largely (although not exclusively) used to educate, train, and house United States Navy sailors and United States Marine Corps in the V-12 Navy College Training Program.

The fraternities of Dartmouth College were directly involved in the Civil Rights Movement of the 1950s, expanding and popularizing an issue that had first appeared as a result of WWII, where the service branches became largely integrated. In the immediate post-war period, for the first time, poor, as well as minority students, sought higher education in significant numbers, aided by the GI Bill. Students in the Northeast, the Midwest, and the West were quicker to adopt this cause; southern schools followed. In 1952, Dartmouth's Alpha Theta chapter of Theta Chi, a group dating to 1921, was derecognized by its national organization over a dispute regarding minority membership. The Dartmouth chapter was reorganized as a local fraternity named Alpha Theta. A campus-wide referendum held in 1954 on the issue of desegregation of fraternities resulted in a majority in favor of requiring fraternities on campus to eliminate racially discriminatory membership policies by the year 1960, and to secede from national groups that retained such policies in their charters. This became a binding obligation imposed on the fraternities by the college administration, and several fraternities at Dartmouth dissociated from their national organizations, including the chapters of Phi Sigma Kappa (originally Tau chapter (1905)) which withdrew in 1956, Delta Tau Delta (originally Gamma Gamma chapter (1901)) which withdrew in 1960, Phi Delta Theta (originally New Hampshire Alpha chapter (1884)) which withdrew in 1960, Sigma Chi (originally Eta Eta chapter (1892)) which withdrew in 1960, and Sigma Nu (originally Delta Beta chapter (1907)) which withdrew in 1963 but has since been re-established. Ironically, these and other national fraternities moved fairly quickly to remove bias clauses, in comparison to other institutions of society; thus the Dartmouth chapters which were at the forefront of agitating for these changes won the battle, even as they left their former organizations.