A - Oglala Sioux Tribe of the Pine Ridge Reservation, South Dakota
B - Rosebud Sioux Tribe of the Rosebud Indian Reservation, South Dakota
C - Yankton Sioux Tribe of South Dakota
D - Lower Brule Sioux Tribe of the Lower Brule Reservation, South Dakota
E - Crow Creek Sioux Tribe of the Crow Creek Reservation, South Dakota
F - Cheyenne River Sioux Tribe of the Cheyenne River Reservation, South Dakota
G - Standing Rock Sioux Tribe of North & South Dakota
H - Sisseton-Wahpeton Sioux Tribe of the Lake Traverse Reservation, South Dakota
I - Flandreau Santee Sioux Tribe of South Dakota
J - Santee Sioux Tribe of the Santee Reservation of Nebraska
K - Assiniboine and Sioux Tribes of the Fort Peck Indian Reservation, Montana
L - Spirit Lake Tribe, North Dakota (formerly known as the Devils Lake Sioux Tribe)
M - Upper Sioux Indian Community of the Upper Sioux Reservation, Minnesota
N - Lower Sioux Indian Community of Minnesota Mdewakanton Sioux Indians of the Lower Sioux Reservation in Minnesota
O - Shakopee Mdewakanton Sioux Community of Minnesota (Prior Lake)
P - Prairie Island Indian Community of Minnesota Mdewakanton Sioux Indians of the Prairie Island Reservation, Minnesota