Breien is an unincorporated community in Morton County, in the U.S. state of North Dakota.
A post office called Breien was established in 1916, and remained in operation until 1985. In the 1930s, Breien had a population of 53 inhabitants.
Coordinates: 46°22′48″N 100°56′32″W / 46.38000°N 100.94222°W