Jay R. Vargas (born July 29, 1938) is a retired United States Marine Corps colonel who served in the Vietnam War. He received the Medal of Honor for "conspicuous gallantry and intrepidity at the risk of his life above and beyond the call of duty" in 1968. Vargas is one of four brothers who has served in combat in the United States Armed Forces in time of war — World War II, the Korean War, and the Vietnam War.