Marvin Nelson (born June 1, 1958) is an American politician from the state of North Dakota. He serves in the North Dakota House of Representatives as a member of the North Dakota Democratic-Nonpartisan League Party. Nelson has served in the North Dakota House for the 9th district since January 2011. He was a candidate for Governor of North Dakota in the 2016 gubernatorial election. Joan Heckaman was the Lt. Governor candidate on the ticket. Nelson lost to Doug Burgum in the general election.