The University of Massachusetts Dartmouth (UMass Dartmouth or UMassD) is a public research university in Dartmouth, Massachusetts. It is the southernmost campus of the University of Massachusetts system. Formerly "Southeastern Massachusetts University" (known locally as "SMU"), it was merged into the University of Massachusetts system in 1991.

The campus has an overall student body of 8,513 students (school year 2019–2020), including 6,841 undergraduates and 1,672 graduate/law students. As of the 2019–2020 academic year, UMass Dartmouth had 402 full-time faculty on staff. The Dartmouth campus also includes the University of Massachusetts School of Law. UMass Dartmouth is classified among "R2: Doctoral Universities – High research activity".

The university has nine colleges including law, engineering, art & science and honors college, each having several departments.