A Romanian American (Romanian: Român American) is a citizen of the United States who has significant Romanian heritage. For the 2000 US Census, 367,310 Americans indicated Romanian as their first ancestry, while 518,653 persons declared to have Romanian ancestry. Other sources provide higher estimates for the numbers of Romanian Americans in the contemporary US; for example, the Romanian-American Network Inc. supplies a rough estimate of 1.2 million. There is also a significant number of persons of Romanian Jewish ancestry, estimated at about 250,000.

The migration of Romanians to the US started in the second half of the 19th century. They came mostly from the territories that were under Austro-Hungarian rule: Transylvania, Banat, Bucovina, Crişana and Maramureş. Some of them came with the intention to work for some years and to return after raising money, while others decided to remain. Those Romanians migrated mostly in the industrial centers around the Great Lakes (Cleveland, Chicago, Detroit etc.). They were also some immigrants from "Lesser Romania". For example, in 1905, 7,818 Romanians migrated to the US, including 7,261 from Austria-Hungary, 423 from "Lesser Romania", and the rest came from other European countries. The migrants from the Romanian Old Kingdom were mostly Jews and they settled mostly in New York. One of their prominent organizations was the United Rumanian Jews of America. 75,000 Romanian Jews emigrated in the period 1881-1914, mostly to the United States.