Pottawattamie County is a county located in the U.S. state of Iowa. At the 2020 census, the population was 93,667, making it the tenth-most populous county in Iowa. The county takes its name from the Potawatomi Native American tribe. The county seat is Council Bluffs.

The Potawatomi, also spelled Pottawatomi and Pottawatomie, are a Native American people of the Great Plains, upper Mississippi River, and western Great Lakes region. They traditionally speak the Potawatomi language, a member of the Algonquian family. The Potawatomi call themselves Neshnabé, a cognate of the word Anishinaabe. The Potawatomi are part of a long-term alliance, called the Council of Three Fires, with the Ojibway and Odawa (Ottawa). In the Council of Three Fires, the Potawatomi are considered the "youngest brother". Their people are referred to in this context as Bodéwadmi, a name that means "keepers of the fire" and refers to the council fire of three peoples.