The University of Massachusetts Dartmouth (UMass Dartmouth, UMassD, or "UMD") is one of five campuses and operating subdivisions of the University of Massachusetts (UMass). It is located in North Dartmouth, Massachusetts, United States, in the center of the South Coast region, between the cities of New Bedford to the east and Fall River to the west. It became a UMass campus in 1991 when Southeastern Massachusetts University was merged into the University of Massachusetts system.

In 2011, UMass Dartmouth became the first university in the world to have a sustainability report that met the top level of the world's most comprehensive, credible, and widely-used standard (the GRI's G3.1 standard). In 2013, UMass Dartmouth became the first university in the world whose annual sustainability report achieved an A+ application level according to the GRI G3.1 standard (by having the sources of data used in its annual sustainability report verified by an independent third party).