John Cooper Wiley (September 26, 1893 – February 3, 1967)[1] was a United States Foreign Service officer and ambassador.

He entered the United States Foreign Service in 1915 and served in several positions in Europe and South America.

[2] In 1938, he was the Chargé d'Affaires ad interim in Austria, the Envoy Extraordinary, and the Minister Plenipotentiary to Latvia and Estonia (the last ambassador before the Soviet occupation in 1940).

After World War II, Wiley headed the negotiations with the Soviet Union to liquidate lend-lease accounts that allowed the US to provide arms for the Allied Powers.

John Cooper Wiley was married to Irena Monique Baruch (1906-1972), a well-known sculptor and portrait painter.