Omaha is a city located in the state of Nebraska on the Missouri River. Atchison is a city located in the northeastern corner of Kansas on the Missouri River. Osage is a city located in Mitchell County, Iowa, on the Missouri River. Pierre is the capital of South Dakota and is located on the Missouri River. Ozark is a city located in Franklin County, Arkansas, on the banks of the Arkansas River, which is a tributary of the Missouri River. Otoe is a city located in Nemaha County, Nebraska, on the Missouri River.