Edwin James Benson (October 23, 1931 – December 6, 2016) was an educator and the last native speaker of the Mandan language. He was born in Elbow Woods, North Dakota, on the Fort Berthold Reservation in McLean County, North Dakota. When the Garrison Dam was built, Benson and his family were relocated to Twin Buttes, North Dakota. He taught Mandan at Twin Buttes Elementary School, and was awarded an honorary doctorate from the University of North Dakota in 2009. He was involved in efforts to teach the basics of Mandan to youth.(aged 85); Ma-doke-wa-des-she, modern Mandan orthography: Wéroke Wáatashe, Iron Bison
He was the last fluent speaker of Mandan language. When he died on December 9, 2016, the Mandan language became extinct.
- "Edwin Benson, Language Teacher". Video and transcript of Benson teaching Mandan (in English and Mandan). Retrieved 2009-06-11.CS1 maint: Unrecognized language (link)
- Edwin Benson-obituary
- Jodi Rave (2009-05-11). "The last speaker: UND to honor Mandan, last to speak Nu'eta as 1st language". The Missoulian. Missoula, MT. Retrieved 2012-07-09.
- "Edwin Benson, last-known fluent speaker of Mandan, passes away at 85". Retrieved 2016-11-10.