Marilyn Priscilla Johnson (June 19, 1922 – September 19, 2022) was an American diplomat who served as United States Ambassador to Togo. She was appointed to that position on September 23, 1978, and left her post on July 29, 1981. She graduated from Radcliffe College with a B.A. in 1944 and from Middlebury College in 1952 with an M.A. She enlisted in the U.S. Navy from 1944 to 1946. Johnson died at her home in Bethlehem, New Hampshire, on September 19, 2022, at the age of 100.