| Year | Won | Margin | Democratic | Republican | Total |
|---|---|---|---|---|---|
| 2024 | D | 33,784 | 26,177 | 62,144 | |
| 2020 | D | 36,359 | 26,779 | 65,202 | |
| 2016 | D | 26,053 | 23,365 | 54,935 | |
| 2012 | R | 24,663 | 24,986 | 51,676 | |
| 2008 | D | 28,617 | 25,663 | 55,647 | |
| 2004 | R | 24,220 | 28,790 | 53,920 | |
| 2000 | R | 17,670 | 25,998 | 47,479 | |
| 1996 | R | 15,369 | 21,784 | 43,219 | |
| 1992 | R | 15,433 | 17,343 | 44,201 | |
| 1988 | R | 14,980 | 21,383 | 37,023 | |
| 1984 | R | 11,198 | 19,809 | 31,768 | |
| 1980 | R | 7,605 | 15,207 | 26,261 | |
| 1976 | R | 7,926 | 8,170 | 16,881 | |
| 1972 | R | 5,693 | 8,004 | 14,638 | |
| 1968 | R | 4,607 | 6,061 | 11,794 | |
| 1964 | D | 6,397 | 4,899 | 11,318 | |
| 1960 | R | 4,633 | 5,419 | 10,141 | |
| 1956 | R | 3,667 | 5,475 | 9,173 | |
| 1952 | R | 3,476 | 6,252 | 9,818 | |
| 1948 | R | 3,914 | 3,917 | 8,326 | |
| 1944 | D | 3,266 | 2,648 | 5,961 | |
| 1940 | D | 5,782 | 2,863 | 8,759 | |
| 1936 | D | 5,128 | 1,913 | 7,131 | |
| 1932 | D | 3,544 | 1,842 | 5,596 | |
| 1928 | R | 1,959 | 2,173 | 4,179 | |
| 1924 | R | 307 | 1,513 | 3,583 | |
| 1920 | R | 747 | 2,055 | 3,163 | |
| 1916 | D | 2,548 | 1,586 | 4,503 | |
| 1912 | D | 1,851 | 0 | 4,014 | |
| 1908 | R | 1,368 | 1,825 | 3,588 | |
| 1904 | R | 1,167 | 2,249 | 3,830 | |
| 1900 | R | 1,758 | 2,449 | 4,380 | |
| 1896 | D | 2,360 | 1,985 | 4,435 | |
| 1892 | R | 1,634 | 1,757 | 4,101 | |
| 1888 | R | 1,923 | 2,167 | 4,192 | |
| 1884 | R | 1,791 | 2,368 | 4,219 | |
| 1880 | R | 2,029 | 2,241 | 4,292 | |
| 1876 | R | 1,905 | 2,300 | 4,205 |
Nevada County, California swung Democratic by 12.2 points in 2024, a margin shaped by its mix of remote workers, college-educated transplants, and longtime rural residents concentrated around Grass Valley and Truckee.
The county's recent history is a story of close margins. The Democratic margin reached forty-six points in 1912; the Republican margin reached forty-one points in 1920. Most other elections have been decided by single-digit points.
Nevada County's demographics — a population of 102,481, a 84% non-Hispanic-white share, a median household income of $89,882 — situate the county close to national averages on several dimensions. The county's voting pattern over the last decade is most similar to that of Ouray County and Douglas County.
