Camp McClellan is a former Union Army camp in the U.S. state of Iowa that was established in Davenport in August 1861 after the outbreak of the American Civil War. The camp was the training grounds for recruits and a hospital for the wounded. In 1863 it became a prison camp called Camp Kearney for members of the Sioux, or Dakota, tribe that were involved in raids in Minnesota. The camp was decommissioned after the release of the prisoners in 1866.