Idaho — 1940 presidential election
Recent presidential results
Akashicstate1940 presidential electionIdaho · PresidentRooseveltD+9.1
How it voted
Share of the 1940 vote
| Franklin D. Roosevelt ✓Democratic | 54.4% | 127,842 |
|---|---|---|
| Wendell WillkieRepublican | 45.3% | 106,553 |
| OtherAll other candidates | 0.3% | 773 |
1940presidential margin
D+60R+60
44 counties, each filled by 1940 D-vs-R margin. Hover any county for its result.
Idaho cast 4 electoral votes this cycle.
County-level results (44 counties) — table
| County | Winner | Margin |
|---|---|---|
| Ada County, ID | Republican | R+1.9 |
| Adams County, ID | Democratic | D+8.8 |
| Bannock County, ID | Democratic | D+31.9 |
| Bear Lake County, ID | Democratic | D+7.0 |
| Benewah County, ID | Democratic | D+19.1 |
| Bingham County, ID | Democratic | D+2.0 |
| Blaine County, ID | Democratic | D+16.2 |
| Boise County, ID | Democratic | D+16.1 |
| Bonner County, ID | Democratic | D+11.0 |
| Bonneville County, ID | Democratic | D+19.1 |
| Boundary County, ID | Democratic | D+6.4 |
| Butte County, ID | Democratic | D+2.9 |
| Camas County, ID | Democratic | D+1.9 |
| Canyon County, ID | Republican | R+0.8 |
| Caribou County, ID | Democratic | D+25.5 |
| Cassia County, ID | Democratic | D+3.2 |
| Clark County, ID | Republican | R+30.6 |
| Clearwater County, ID | Democratic | D+33.7 |
| Custer County, ID | Democratic | D+8.1 |
| Elmore County, ID | Democratic | D+20.5 |
| Franklin County, ID | Democratic | D+2.1 |
| Fremont County, ID | Democratic | D+12.3 |
| Gem County, ID | Democratic | D+29.1 |
| Gooding County, ID | Republican | R+10.1 |
| Idaho County, ID | Democratic | D+4.5 |
| Jefferson County, ID | Democratic | D+20.9 |
| Jerome County, ID | Republican | R+14.5 |
| Kootenai County, ID | Democratic | D+15.9 |
| Latah County, ID | Democratic | D+6.2 |
| Lemhi County, ID | Democratic | D+8.2 |
| Lewis County, ID | Democratic | D+33.3 |
| Lincoln County, ID | Republican | R+6.5 |
| Madison County, ID | Democratic | D+15.2 |
| Minidoka County, ID | Democratic | D+0.1 |
| Nez Perce County, ID | Democratic | D+27.1 |
| Oneida County, ID | Democratic | D+11.6 |
| Owyhee County, ID | Democratic | D+5.9 |
| Payette County, ID | Republican | R+17.5 |
| Power County, ID | Republican | R+1.1 |
| Shoshone County, ID | Democratic | D+29.9 |
| Teton County, ID | Democratic | D+11.7 |
| Twin Falls County, ID | Republican | R+10.7 |
| Valley County, ID | Democratic | D+20.8 |
| Washington County, ID | Democratic | D+9.3 |
Idaho results by county
44 counties. Third-party and independent votes are reported by the county source as one combined figure; every named candidate is listed in the complete result below.
| Led by | |||||
|---|---|---|---|---|---|
| Ada County | Wendell Willkie+480 | 12,38149.0% | 12,86150.8% | 510.2% | 25,293 |
| Adams County | Franklin D. Roosevelt+150 | 92954.3% | 77945.5% | 30.2% | 1,711 |
| Bannock County | Franklin D. Roosevelt+5,074 | 10,49365.9% | 5,41934.1% | 10.0% | 15,913 |
| Bear Lake County | Franklin D. Roosevelt+265 | 2,02653.5% | 1,76146.5% | 00.0% | 3,787 |
| Benewah County | Franklin D. Roosevelt+620 | 1,92459.2% | 1,30440.1% | 220.7% | 3,250 |
| Bingham County | Franklin D. Roosevelt+153 | 3,81550.9% | 3,66248.9% | 110.1% | 7,488 |
| Blaine County | Franklin D. Roosevelt+435 | 1,55958.0% | 1,12441.8% | 40.1% | 2,687 |
| Boise County | Franklin D. Roosevelt+188 | 67758.0% | 48941.9% | 10.1% | 1,167 |
| Bonner County | Franklin D. Roosevelt+762 | 3,83455.2% | 3,07244.3% | 340.5% | 6,940 |
| Bonneville County | Franklin D. Roosevelt+1,892 | 5,89159.5% | 3,99940.4% | 100.1% | 9,900 |
| Boundary County | Franklin D. Roosevelt+172 | 1,39351.9% | 1,22145.5% | 702.6% | 2,684 |
| Butte County | Franklin D. Roosevelt+25 | 44851.4% | 42348.6% | 00.0% | 871 |
| Camas County | Franklin D. Roosevelt+14 | 38150.9% | 36749.1% | 00.0% | 748 |
| Canyon County | Wendell Willkie+137 | 8,63949.4% | 8,77650.2% | 630.4% | 17,478 |
| Caribou County | Franklin D. Roosevelt+268 | 65862.7% | 39037.2% | 10.1% | 1,049 |
| Cassia County | Franklin D. Roosevelt+182 | 2,93051.5% | 2,74848.3% | 110.2% | 5,689 |
| Clark County | Wendell Willkie+187 | 21234.7% | 39965.3% | 00.0% | 611 |
| Clearwater County | Franklin D. Roosevelt+1,156 | 2,28466.6% | 1,12832.9% | 170.5% | 3,429 |
| Custer County | Franklin D. Roosevelt+134 | 89453.9% | 76045.8% | 50.3% | 1,659 |
| Elmore County | Franklin D. Roosevelt+555 | 1,63260.2% | 1,07739.7% | 40.1% | 2,713 |
| Franklin County | Franklin D. Roosevelt+89 | 2,15851.1% | 2,06948.9% | 00.0% | 4,227 |
| Fremont County | Franklin D. Roosevelt+560 | 2,55656.1% | 1,99643.8% | 20.0% | 4,554 |
| Gem County | Franklin D. Roosevelt+1,204 | 2,66664.5% | 1,46235.4% | 40.1% | 4,132 |
| Gooding County | Wendell Willkie+433 | 1,91944.9% | 2,35255.0% | 40.1% | 4,275 |
| Idaho County | Franklin D. Roosevelt+247 | 2,88852.1% | 2,64147.6% | 160.3% | 5,545 |
| Jefferson County | Franklin D. Roosevelt+914 | 2,63160.3% | 1,71739.3% | 160.4% | 4,364 |
| Jerome County | Wendell Willkie+639 | 1,88142.7% | 2,52057.2% | 70.2% | 4,408 |
| Kootenai County | Franklin D. Roosevelt+1,664 | 5,99757.3% | 4,33341.4% | 1321.3% | 10,462 |
| Latah County | Franklin D. Roosevelt+523 | 4,49452.9% | 3,97146.7% | 350.4% | 8,500 |
| Lemhi County | Franklin D. Roosevelt+252 | 1,66454.1% | 1,41245.9% | 10.0% | 3,077 |
| Lewis County | Franklin D. Roosevelt+733 | 1,46266.5% | 72933.2% | 70.3% | 2,198 |
| Lincoln County | Wendell Willkie+123 | 88646.6% | 1,00953.0% | 70.4% | 1,902 |
| Madison County | Franklin D. Roosevelt+586 | 2,21857.6% | 1,63242.4% | 10.0% | 3,851 |
| Minidoka County | Franklin D. Roosevelt+3 | 1,98249.9% | 1,97949.8% | 130.3% | 3,974 |
| Nez Perce County | Franklin D. Roosevelt+2,554 | 5,96363.3% | 3,40936.2% | 410.4% | 9,413 |
| Oneida County | Franklin D. Roosevelt+300 | 1,44055.7% | 1,14044.1% | 40.2% | 2,584 |
| Owyhee County | Franklin D. Roosevelt+129 | 1,16052.6% | 1,03146.8% | 140.6% | 2,205 |
| Payette County | Wendell Willkie+764 | 1,79041.0% | 2,55458.5% | 200.5% | 4,364 |
| Power County | Wendell Willkie+20 | 93149.4% | 95150.5% | 30.2% | 1,885 |
| Shoshone County | Franklin D. Roosevelt+3,040 | 6,56564.5% | 3,52534.7% | 820.8% | 10,172 |
| Teton County | Franklin D. Roosevelt+177 | 84455.9% | 66744.1% | 00.0% | 1,511 |
| Twin Falls County | Wendell Willkie+1,745 | 7,28644.6% | 9,03155.2% | 340.2% | 16,351 |
| Valley County | Franklin D. Roosevelt+404 | 1,16560.0% | 76139.2% | 170.9% | 1,943 |
| Washington County | Franklin D. Roosevelt+393 | 2,29654.6% | 1,90345.3% | 50.1% | 4,204 |
Nominees: Franklin D. Roosevelt (D) · Wendell Willkie (R)
Idaho's presidential margins
1892–2024, the 1940 contest in context
| Year | Margin (D minus R) |
|---|---|
| 1892 | −44.2% |
| 1896 | +56.8% |
| 1900 | +3.8% |
| 1904 | −40.4% |
| 1908 | −16.9% |
| 1912 | +1.1% |
| 1916 | +10.9% |
| 1920 | −31.3% |
| 1924 | −30.8% |
| 1928 | −29.3% |
| 1932 | +20.4% |
| 1936 | +29.8% |
| 1940 | +9.1% |
| 1944 | +3.5% |
| 1948 | +2.7% |
| 1952 | −31.0% |
| 1956 | −22.4% |
| 1960 | −7.6% |
| 1964 | +1.8% |
| 1968 | −26.1% |
| 1972 | −38.2% |
| 1976 | −22.8% |
| 1980 | −41.3% |
| 1984 | −46.0% |
| 1988 | −26.1% |
| 1992 | −13.6% |
| 1996 | −18.5% |
| 2000 | −39.5% |
| 2004 | −38.1% |
| 2008 | −25.4% |
| 2012 | −31.9% |
| 2016 | −31.8% |
| 2020 | −30.8% |
| 2024 | −36.5% |
Source. Compiled historical county records — 1940 presidential returns · official county-level results. Real returns — nothing estimated.