Ft. Berthold Agency
(See also Upper Missouri Agency)

 Fort Berthold Agency was established in 1864 when the Upper Missouri Agency was divided. It served the Mandan, Grosventre, Arikara, Assiniboin and Crow Indians near Fort Berthold and Fort Union in present day North Dakota and Montana.

 Letters Received by the Office of Indian Affairs, 1867-80 (M-234).
Inventory available from NARA.
Inclusive dates NARA roll # SD Archives roll #
1867-70 292 1454
1871-72 293 1454
1873-74 294 1455
1875-76 295 1456
1877-78 (A908) 296 1457
1878 (A910)-1879 (E361) 297 1458
1879 (E362-W2331) 298 1458
1880 299 1459

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SD State Archives,  605-773-3804, fax 605-773-6041; email archref@state.sd.us