John Marshall Evans (born 1950) is an American former diplomat who served as United States ambassador to Armenia.

He pursued doctoral studies in history at Columbia University but left after one semester to join the U.S. Foreign Service in 1971.

Evans served in the US foreign service in various capacities in Iran, Czechoslovakia, the former Soviet Union, and with the OSCE and NATO, as well as in the Office of Secretary of State Cyrus Vance and on the USSR desk.

"[5] It has been suggested that Turkey, an important U.S. ally in the Middle East, pressured the Department of State to remove Evans for his personal beliefs and statements.

The Bush administration re-nominated Hoagland when the 110th session of the United States Congress convened, but the nomination was ultimately not confirmed.