Belcourt is a census-designated place in Rolette County, North Dakota, United States. It is within the Turtle Mountain Indian Reservation. The population was 1,510 at the 2020 census. The community is the seat of the Turtle Mountain Band of Chippewa Indians. Belcourt was originally known as Siipiising, which is Anishinaabe for "creek that sings with life-giving water." The name refers to what European Americans called "Ox Creek", which flows through the center of town.