R. Douglas Stuart Jr., American businessman and diplomat, United States Ambassador to Norway (b. 1916)

Robert Douglas Stuart Jr. (April 26, 1916 – May 8, 2014) was the son of Quaker Oats Company co-founder Robert Douglas Stuart, the founder of the America First Committee in 1940, the CEO of Quaker Oats from 1966 to 1981, and United States Ambassador to Norway from 1984 to 1989.