Chouteau County is located in the north-central part of the state of Montana. It was established in 1865 and is named after Pierre Chouteau Jr., a prominent fur trader. The county covers an area of approximately 5,200 square miles and features a mix of plains and river valleys, including parts of the Missouri River. The county seat is Fort Benton, which is known for its rich history as a trading post and its role in the westward expansion of the United States. Chouteau County is primarily rural, with agriculture being a significant part of the local economy, alongside tourism and outdoor activities.