See main article: 1856 United States presidential election.
| Election Name: | 1856 United States presidential election in Iowa |
| Country: | Iowa |
| Flag Year: | 1856 |
| Type: | presidential |
| Ongoing: | no |
| Previous Election: | 1852 United States presidential election in Iowa |
| Previous Year: | 1852 |
| Next Election: | 1860 United States presidential election in Iowa |
| Next Year: | 1860 |
| Election Date: | November 4, 1856 |
| Image1: | John Charles Fremont crop.jpg |
| Nominee1: | John C. Frémont |
| Party1: | Republican Party (United States) |
| Home State1: | California |
| Running Mate1: | William L. Dayton |
| Electoral Vote1: | 4 |
| Popular Vote1: | 45,073 |
| Percentage1: | 48.83% |
| Nominee2: | James Buchanan |
| Party2: | Democratic Party (United States) |
| Home State2: | Pennsylvania |
| Running Mate2: | John C. Breckinridge |
| Electoral Vote2: | 0 |
| Popular Vote2: | 37,568 |
| Percentage2: | 40.70% |
| Image3: | Fillmore (cropped).jpg |
| Nominee3: | Millard Fillmore |
| Party3: | Know Nothing |
| Home State3: | New York |
| Running Mate3: | Andrew J. Donelson |
| Electoral Vote3: | 0 |
| Popular Vote3: | 9,669 |
| Percentage3: | 10.47% |
| Map Size: | 300px |
| President | |
| Before Election: | Franklin Pierce |
| Before Party: | Democratic Party (United States) |
| After Election: | James Buchanan |
| After Party: | Democratic Party (United States) |
The 1856 United States presidential election in Iowa took place on November 4, 1856, as part of the 1856 United States presidential election. Voters chose four representatives, or electors to the Electoral College, who voted for president and vice president.
Iowa voted for the Republican candidate, John C. Frémont, over Democratic candidate, James Buchanan and American Party candidate Millard Fillmore. Frémont won Iowa by a margin of 8.13%.
Buchanan is the second of only 6 US presidents and the first of 4 Democratic presidents to have never won Iowa.