Romanian Americans are Americans who have Romanian ancestry. According to the 2017 American Community Survey, 478,278 Americans indicated Romanian as their first or second ancestry, however other sources provide higher estimates, which are most likely more accurate, for the numbers of Romanian Americans in the contemporary United States; for example, the Romanian-American Network supplies a rough estimate of 1.2 million who are fully or partially of Romanian ethnicity. There is also a significant number of people of Romanian Jewish ancestry, estimated at about 225,000.

Romanian is the official and main language of Romania and Moldova. Romanian is part of the Eastern Romance sub-branch of Romance languages, a linguistic group that evolved from several dialects of Vulgar Latin which separated from the Western Romance languages in the course of the period from the 5th to the 8th centuries. To distinguish it within the Eastern Romance languages, in comparative linguistics it is called Daco-Romanian as opposed to its closest relatives, Aromanian, Megleno-Romanian, and Istro-Romanian. It is also spoken as a minority language by stable communities in the countries surrounding Romania, and by the large Romanian diaspora. In total, it is spoken by 25 million people as a first language.