Atchison is a city situated along the Missouri River in the eastern part of Atchison County, located in northeast Kansas. It is the county seat as well as the most populous city in the county. Its population at the 2010 census was 11,021. The city is named for David Rice Atchison, United States senator from Missouri.
The city is popularly known as the most haunted city in America. It was also the birthplace of Amelia Earhart, and the Amelia Earhart Festival is held annually in July. Benedictine College, a Catholic liberal-arts college is located in Atchinson.