See main article: 1920 United States presidential election.
| Election Name: | 1920 United States presidential election in Delaware |
| Country: | Delaware |
| Type: | presidential |
| Ongoing: | no |
| Previous Election: | 1916 United States presidential election in Delaware |
| Previous Year: | 1916 |
| Next Election: | 1924 United States presidential election in Delaware |
| Next Year: | 1924 |
| Election Date: | November 2, 1920 |
| Image1: | Warren G Harding-Harris & Ewing crop.jpg |
| Nominee1: | Warren G. Harding |
| Party1: | Republican Party (United States) |
| Home State1: | Ohio |
| Running Mate1: | Calvin Coolidge |
| Electoral Vote1: | 3 |
| Popular Vote1: | 52,858 |
| Percentage1: | 55.71% |
| Nominee2: | James M. Cox |
| Party2: | Democratic Party (United States) |
| Home State2: | Ohio |
| Running Mate2: | Franklin D. Roosevelt |
| Electoral Vote2: | 0 |
| Popular Vote2: | 39,911 |
| Percentage2: | 42.07% |
| Map Size: | 210px |
| President | |
| Before Election: | Woodrow Wilson |
| Before Party: | Democratic Party (United States) |
| After Election: | Warren G. Harding |
| After Party: | Republican Party (United States) |
The 1920 United States presidential election in Delaware took place on November 2, 1920. All contemporary 48 states were part of the 1920 United States presidential election. State voters chose three electors to the Electoral College, which selected the president and vice president.
Delaware was won by the Republican nominee, Senator Warren G. Harding of Ohio, over the Democratic nominee, Governor James M. Cox of Ohio. Harding ran with Governor Calvin Coolidge of Massachusetts, while Cox ran with future President Franklin D. Roosevelt of New York.