| Year | Won | Margin | Democratic | Republican | Total |
|---|---|---|---|---|---|
| 2024 | R | 4,020 | 5,725 | 10,070 | |
| 2020 | R | 4,561 | 6,445 | 11,260 | |
| 2016 | R | 3,459 | 5,420 | 9,850 | |
| 2012 | R | 4,026 | 5,721 | 10,080 | |
| 2008 | R | 4,715 | 6,035 | 11,028 | |
| 2004 | R | 4,129 | 6,905 | 11,190 | |
| 2000 | R | 3,458 | 6,343 | 10,401 | |
| 1996 | R | 3,540 | 4,905 | 9,750 | |
| 1992 | D | 3,742 | 3,599 | 9,949 | |
| 1988 | R | 4,251 | 4,603 | 9,015 | |
| 1984 | R | 3,837 | 5,224 | 9,228 | |
| 1980 | R | 2,911 | 4,182 | 8,161 | |
| 1976 | D | 3,429 | 2,884 | 6,563 | |
| 1972 | D | 3,057 | 2,952 | 6,360 | |
| 1968 | D | 2,961 | 2,097 | 5,611 | |
| 1964 | D | 4,019 | 1,686 | 5,713 | |
| 1960 | D | 3,333 | 2,015 | 5,378 | |
| 1956 | D | 3,127 | 2,267 | 5,415 | |
| 1952 | D | 3,174 | 2,491 | 5,721 | |
| 1948 | D | 3,125 | 1,657 | 5,058 | |
| 1944 | D | 2,625 | 1,126 | 3,759 | |
| 1940 | D | 3,418 | 1,270 | 4,740 | |
| 1936 | D | 2,707 | 680 | 3,435 | |
| 1932 | D | 2,035 | 582 | 2,684 | |
| 1928 | D | 1,079 | 947 | 2,075 | |
| 1924 | R | 182 | 564 | 1,713 | |
| 1920 | R | 403 | 999 | 1,562 | |
| 1916 | D | 1,025 | 663 | 1,814 | |
| 1912 | D | 742 | 0 | 1,781 | |
| 1908 | R | 395 | 659 | 1,138 | |
| 1904 | R | 347 | 707 | 1,083 | |
| 1900 | R | 442 | 640 | 1,095 | |
| 1896 | R | 575 | 678 | 1,268 | |
| 1892 | R | 537 | 642 | 1,231 | |
| 1888 | R | 570 | 648 | 1,233 | |
| 1884 | R | 554 | 712 | 1,275 | |
| 1880 | R | 645 | 698 | 1,344 | |
| 1876 | R | 502 | 583 | 1,085 |
Plumas County's economy has long centered on timber, ranching, and outdoor recreation, and its sparse, rural population consistently produces some of the widest Republican margins among California's mountain counties.
The Republican margin in Plumas County reached its widest at thirty-eight points in 1920. The margin in 2024 was seventeen points, in line with the county's deep historical pattern.
Plumas County's loyalty is rooted in its place. Median household income of $66,031, a 84% non-Hispanic-white share, and a population of 19,423 together describe a community whose political habits are deeply settled. The county's voting pattern over the last decade is most similar to that of Sierra County and Siskiyou County.
