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.
Many Republicans sought the presidential nomination, including General Leonard Wood, Illinois Governor Frank Lowden and California Senator Hiram Johnson. Dark horse Harding, however, was nominated. Many wanted to nominate Wisconsin Senator Irvine L. Lenroot for vice president, but Coolidge was nominated instead, because he was known for his response to the Boston Police Strike in 1919.