Dartmouth College (; DART-məth) is a private Ivy League research university in Hanover, New Hampshire, United States. Established in 1769 by Eleazar Wheelock, it is the ninth-oldest institution of higher education in the United States and one of the nine colonial colleges chartered before the American Revolution. Although founded to educate Native Americans in Christian theology and the English way of life, Dartmouth primarily trained Congregationalist ministers during its early history before it gradually secularized, emerging at the turn of the 20th century from relative obscurity into national prominence.Following a liberal arts curriculum, the university provides undergraduate instruction in 40 academic departments and interdisciplinary programs, including 57 majors in the humanities, social sciences, natural sciences, and engineering, and enables students to design specialized concentrations or engage in dual degree programs. Dartmouth comprises five constituent schools: the original undergraduate college, the Geisel School of Medicine, the Thayer School of Engineering, the Tuck School of Business, and the Guarini School of Graduate and Advanced Studies. The university also has affiliations with the Dartmouth–Hitchcock Medical Center, the Rockefeller Center for Public Policy and the Social Sciences, and the Hopkins Center for the Arts. With a student enrollment of about 6,600, Dartmouth is the smallest university in the Ivy League. Undergraduate admissions are highly selective with an acceptance rate of 6.17% for the class of 2025.Situated on a terrace above the Connecticut River, Dartmouth's 269-acre (109 ha) main campus is in the rural Upper Valley region of New England. The university functions on a quarter system, operating year-round on four ten-week academic terms. Dartmouth is known for its strong undergraduate focus, Greek culture, and wide array of enduring campus traditions. Its 34 varsity sports teams compete intercollegiately in the Ivy League conference of the NCAA Division I.

Dartmouth is consistently cited as a leading university for undergraduate teaching by U.S. News & World Report. In 2021, the Carnegie Classification of Institutions of Higher Education listed Dartmouth as the only majority-undergraduate, arts-and-sciences focused, doctoral university in the country that has "some graduate coexistence" and "very high research activity".The university has many prominent alumni, including 170 members of the U.S. Senate and the U.S. House of Representatives, 24 U.S. governors, 10 billionaire alumni, 8 U.S. Cabinet secretaries, 3 Nobel Prize laureates, 2 U.S. Supreme Court justices, and a U.S. vice president. Other notable alumni include 79 Rhodes Scholars, 26 Marshall Scholarship recipients, and 14 Pulitzer Prize winners. Dartmouth alumni also include many CEOs and founders of Fortune 500 corporations, high-ranking U.S. diplomats, academic scholars, literary and media figures, professional athletes, and Olympic medalists.