First Treaty of Prairie du Chien

The Treaty of Prairie du Chien may refer to any of several treaties made and signed in Prairie du Chien, Wisconsin between the United States, representatives from the Sioux, Sac and Fox, Menominee, Iowa, Ho-Chunk and the Anishinaabeg (Ojibwe, Odawa and Potawatomi) Native American peoples.

Prairie du Chien Lines. Subsequent boundary modifications shown as dashed lines.
portrait of Ioway chief Mauck-Coo-Maun, painted at the treaty by James Otto Lewis