| Year | Won | Margin | Democratic | Republican | Total |
|---|---|---|---|---|---|
| 2024 | R | 1,009 | 7,815 | 8,968 | |
| 2020 | R | 843 | 7,513 | 8,562 | |
| 2016 | R | 500 | 5,508 | 6,988 | |
| 2012 | R | 581 | 5,698 | 6,379 | |
| 2008 | R | 911 | 4,689 | 5,744 | |
| 2004 | R | 738 | 4,742 | 5,556 | |
| 2000 | R | 779 | 3,622 | 4,546 | |
| 1996 | R | 892 | 2,648 | 4,159 | |
| 1992 | R | 772 | 1,983 | 4,565 | |
| 1988 | R | 1,227 | 3,118 | 4,403 | |
| 1984 | R | 746 | 4,437 | 5,210 | |
| 1980 | R | 854 | 3,827 | 4,819 | |
| 1976 | R | 1,110 | 2,619 | 3,982 | |
| 1972 | R | 629 | 2,183 | 3,097 | |
| 1968 | R | 858 | 1,733 | 2,834 | |
| 1964 | D | 1,320 | 1,251 | 2,571 | |
| 1960 | R | 1,166 | 1,546 | 2,713 | |
| 1956 | R | 874 | 1,856 | 2,730 | |
| 1952 | R | 1,242 | 1,969 | 3,211 | |
| 1948 | D | 1,588 | 1,266 | 2,870 | |
| 1944 | D | 1,629 | 1,140 | 2,769 | |
| 1940 | D | 1,982 | 1,322 | 3,308 | |
| 1936 | D | 1,970 | 1,070 | 3,085 | |
| 1932 | D | 1,590 | 1,333 | 3,072 | |
| 1928 | R | 899 | 1,585 | 2,497 | |
| 1924 | R | 731 | 1,277 | 2,217 | |
| 1920 | R | 822 | 1,523 | 2,466 | |
| 1916 | D | 1,443 | 687 | 2,549 | |
| 1912 | — | — | — | — | |
| 1908 | — | — | — | — | |
| 1904 | — | — | — | — | |
| 1900 | — | — | — | — | |
| 1896 | — | — | — | — | |
| 1892 | — | — | — | — | |
| 1888 | — | — | — | — | |
| 1884 | — | — | — | — | |
| 1880 | — | — | — | — | |
| 1876 | — | — | — | — |
Duchesne County's economy anchors on oil, gas, and ranching across the Uinta Basin's high desert, producing a rural electorate that backed the Republican presidential nominee by more than 75 points in 2024.
The Democratic margin in Duchesne County peaked at thirty points in 1916. By 1968 the county had flipped, voting Republican for the first time in many years. The 2024 margin was seventy-six points, the most Republican-leaning result in the county's modern history.
The economic context is the key. Duchesne County's median household income of $78,445 sits well below state and national norms, and 12% of residents live below the federal poverty line. The shift here is part of a broader realignment of working-class places across the country. The county's voting pattern over the last decade is most similar to that of Uintah County and Hutchinson County.