Edgar R. Aston (1847 – April 14, 1932) was a soldier in the U.S. Army who served with the 8th U.S. Cavalry during the Apache Wars against Cochise. He was one of two men, along with Pvt. William Cubberly, who received the Medal of Honor for finding a passageway for an army column trapped in a 4,000-foot valley, and later defending his party against an Apache attack, at San Carlos, Arizona on May 30, 1868.