The 1920 Republican National Convention nominated Ohio Senator Warren G. Harding for president and Massachusetts Governor Calvin Coolidge for vice president. The convention was held in Chicago, Illinois, at the Chicago Coliseum from June 8 to June 12, 1920, with 940 delegates. Under convention rules, a majority plus one, or at least 471 of the 940 delegates, was necessary for a nomination.

Warren Gamaliel Harding was an American politician who served as the 29th president of the United States from 1921 until his death in 1923. A member of the Republican Party, he was one of the most popular sitting U.S. presidents. After his death, a number of scandals were exposed, including Teapot Dome, as well as an extramarital affair with Nan Britton, which tarnished his reputation.