See main article: 1844 United States presidential election.
| Election Name: | 1844 United States presidential election in Illinois |
| Country: | Illinois |
| Type: | presidential |
| Ongoing: | no |
| Previous Election: | 1840 United States presidential election in Illinois |
| Previous Year: | 1840 |
| Next Election: | 1848 United States presidential election in Illinois |
| Next Year: | 1848 |
| Election Date: | November 1 - December 4, 1844 |
| Image1: | Polk 1849.jpg |
| Nominee1: | James K. Polk |
| Party1: | Democratic Party (United States) |
| Home State1: | Tennessee |
| Running Mate1: | George M. Dallas |
| Electoral Vote1: | 9 |
| Popular Vote1: | 58,795 |
| Percentage1: | 53.91% |
| Nominee2: | Henry Clay |
| Party2: | Whig Party (United States) |
| Home State2: | Kentucky |
| Running Mate2: | Theodore Frelinghuysen |
| Electoral Vote2: | 0 |
| Popular Vote2: | 45,854 |
| Percentage2: | 42.05% |
| President | |
| Before Election: | John Tyler |
| Before Party: | Independent (politician) |
| After Election: | James K. Polk |
| After Party: | Democratic Party (United States) |
The 1844 United States presidential election in Illinois took place between November 1 and December 4, 1844, as part of the 1844 United States presidential election. Voters chose nine representatives, or electors to the Electoral College, who voted for President and Vice President.
Illinois voted for the Democratic candidate, James K. Polk, over Whig candidate Henry Clay. Polk won Illinois by a margin of 11.86%. Boone County would not vote Democratic again until 2008.