United States presidential elections in Idaho
Following is a table of United States presidential elections in Idaho, ordered by year. Since its admission to statehood in 1890, Idaho has participated in every U.S. presidential election.
Winners of the state are in bold.
| Year | Winner | Votes | Percent | Loser | Votes | Percent | Other national candidates | Votes | Percent | Electoral Votes | Notes |
| 2020 | TBD | TBD | TBD | TBD | TBD | TBD | — | ||||
| 2016 | Donald Trump | 409,055 | 59.25 | Hillary Clinton | 189,765 | 27.48 | - | 4 | |||
| 2012 | Barack Obama | 212,787 | 32.62 | Mitt Romney | 420,911 | 64.53 | - | 4 | |||
| 2008 | Barack Obama | 236,440 | 36.09 | John McCain | 403,012 | 61.52 | - | 4 | |||
| 2004 | George W. Bush | 409,235 | 68.38 | John Kerry | 181,098 | 30.26 | - | 4 | |||
| 2000 | George W. Bush | 336,937 | 67.17 | Al Gore | 138,637 | 27.64 | - | 4 | |||
| 1996 | Bill Clinton | 165,443 | 33.65 | Bob Dole | 256,595 | 52.18 | Ross Perot | 62,518 | 12.71 | 4 | |
| 1992 | Bill Clinton | 137,013 | 28.42 | George H. W. Bush | 202,645 | 42.03 | Ross Perot | 130,395 | 27.05 | 4 | |
| 1988 | George H. W. Bush | 253,881 | 62.08 | Michael Dukakis | 147,272 | 36.01 | - | 4 | |||
| 1984 | Ronald Reagan | 297,523 | 72.36 | Walter Mondale | 108,510 | 26.39 | - | 4 | |||
| 1980 | Ronald Reagan | 290,699 | 66.46 | Jimmy Carter | 110,192 | 25.19 | John B. Anderson | 27,058 | 6.19 | 4 | |
| 1976 | Jimmy Carter | 126,549 | 37.12 | Gerald Ford | 204,151 | 59.88 | - | 4 | |||
| 1972 | Richard Nixon | 199,384 | 64.24 | George McGovern | 80,826 | 26.04 | - | 4 | |||
| 1968 | Richard Nixon | 165,369 | 56.79 | Hubert Humphrey | 89,273 | 30.66 | George Wallace | 36,541 | 12.55 | 4 | |
| 1964 | Lyndon B. Johnson | 148,920 | 50.92 | Barry Goldwater | 143,557 | 49.08 | - | 4 | |||
| 1960 | John F. Kennedy | 138,853 | 46.22 | Richard Nixon | 161,597 | 53.78 | - | 4 | |||
| 1956 | Dwight D. Eisenhower | 166,979 | 61.17 | Adlai Stevenson II | 105,868 | 38.78 | T. Coleman Andrews/ Unpledged Electors | - | 4 | ||
| 1952 | Dwight D. Eisenhower | 180,707 | 65.42 | Adlai Stevenson II | 95,081 | 34.42 | - | 4 | |||
| 1948 | Harry S. Truman | 107,370 | 49.98 | Thomas E. Dewey | 101,514 | 47.26 | Strom Thurmond | - | 4 | ||
| 1944 | Franklin D. Roosevelt | 107,399 | 51.55 | Thomas E. Dewey | 100,137 | 48.07 | - | 4 | |||
| 1940 | Franklin D. Roosevelt | 127,842 | 54.36 | Wendell Willkie | 106,553 | 45.31 | - | 4 | |||
| 1936 | Franklin D. Roosevelt | 125,683 | 62.96 | Alf Landon | 66,256 | 33.19 | - | 4 | |||
| 1932 | Franklin D. Roosevelt | 109,479 | 58.66 | Herbert Hoover | 71,417 | 38.27 | - | 4 | |||
| 1928 | Herbert Hoover | 97,322 | 64.22 | Al Smith | 52,926 | 34.93 | - | 4 | |||
| 1924 | Calvin Coolidge | 69,879 | 47.12 | John W. Davis | 24,256 | 16.36 | Robert M. La Follette Sr. | 54,160 | 36.52 | 4 | |
| 1920 | Warren G. Harding | 88,975 | 65.6 | James M. Cox | 46,579 | 34.34 | Parley P. Christensen | - | - | 4 | |
| 1916 | Woodrow Wilson | 70,054 | 52.04 | Charles E. Hughes | 55,368 | 41.13 | - | 4 | |||
| 1912 | Woodrow Wilson | 33,921 | 32.08 | Theodore Roosevelt | 25,527 | 24.14 | William H. Taft | 32,810 | 31.02 | 4 | |
| 1908 | William H. Taft | 52,621 | 54.09 | William Jennings Bryan | 36,162 | 37.17 | - | 3 | |||
| 1904 | Theodore Roosevelt | 47,783 | 65.84 | Alton B. Parker | 18,480 | 25.46 | - | 3 | |||
| 1900 | William McKinley | 27,198 | 46.96 | William Jennings Bryan | 29,414 | 50.79 | - | 3 | |||
| 1896 | William McKinley | 6,314 | 21.32 | William Jennings Bryan | 23,135 | 78.1 | - | 3 | |||
| 1892 | Grover Cleveland | - | - | Benjamin Harrison | 8,599 | 44.31 | James B. Weaver | 10,520 | 54.21 | 3 |