The 1920 United States presidential election was the 34th quadrennial presidential election, held on Tuesday, November 2, 1920. In the first election held after the end of the First World War and the first election after the ratification of the Nineteenth Amendment, Republican Senator Warren G. Harding of Ohio defeated Democratic Governor James M. Cox of Ohio. It was also the third presidential election in which both major party candidates were registered in the same home state; the others have been in 1860, 1904, 1940, 1944, and 2016.

The 1904 United States presidential election was the 30th quadrennial presidential election, held on Tuesday, November 8, 1904. Incumbent Republican President Theodore Roosevelt defeated the conservative Democratic nominee, Alton B. Parker. Roosevelt's victory made him the first president who ascended to the presidency upon the death of his predecessor to win a full term in his own right. This was also the second presidential election in which both major party candidates were registered in the same home state; the others have been in 1860, 1920, 1940, 1944, and 2016.