Demoin River, South Dakota, United States (Google Maps ⧉, OpenStreetMap ⧉)
Referenced In
History of the Expedition Under the Command of Captains Lewis and Clark: To the Sources of the Missouri, Thence Across the Rocky Mountains and Down the River Columbia to the Pacific Ocean
by Meriwether Lewis, William Clark"…or the neighbourhood of the Yanktons of the river Demoin; of course, there will be a greater excess of goods beyond what the Indians can purchase…"
History of the Expedition Under the Command of Captains Lewis and Clark: To the Sources of the Missouri, Thence Across the Rocky Mountains and Down the River Columbia to the Pacific Ocean
by Meriwether Lewis, William Clark"the trade of the rivers Demoin, St. Peter’s, and all the country west of the Mississippi nearly to the Missouri."