The 1820 United States presidential election in Illinois took place between 1 November and 6 December 1820, as part of the 1820 United States presidential election. Voters chose three representatives, or electors to the Electoral College, who voted for President and Vice President. It was the first Presidential election that Illinois participated in since being admitted to the Union on 3 December 1818.
^Vote for the Democratic-Republicans consists of the combined totals of James Moore, Michael Jones, and Adolphus F. Hubbard.
^Vote for "Others" consists of the combined totals of Charles Campbell, William Campbell, Peter Kimmel, John Edgar, Elisha Mills, William Kinney, John Y. Sawyer, and Abraham Prewitt.