John Gilbert Winant OM (February 23, 1889 – November 3, 1947) was an American diplomat and politician with the Republican party after a brief career as a teacher in Concord, New Hampshire. John Winant held positions in New Hampshire, national, and international politics. He was the 60th governor of New Hampshire from 1925 to 1927 and 1931 to 1935. Winant also served as U.S. Ambassador to the United Kingdom during most of World War II. Depressed by career disappointments, a failed marriage and heavy debts, he committed suicide in 1947.