In 2017, the Three Affiliated Tribes (Mandan, Hidatsa and Arikara Nation) created the United Tribes Gaming Association, a non-profit Indian gaming association representing the five tribes that operate casinos in North Dakota. They are:
- Sisseton Wahpeton Oyate Tribe
- Spirit Lake Nation
- Standing Rock Sioux Tribe
- Three Affiliated Tribes (MHA Nation)
- Turtle Mountain Band of Chippewa Indians
As the organization grows, the board of directors will consider extending membership to other sovereign nations who share UTGA’s goals of promoting, protecting and advocating for Indian gaming and economic development for tribal nations and lands.