| Year | Won | Margin | Democratic | Republican | Total |
|---|---|---|---|---|---|
| 2024 | R | 2,478 | 8,619 | 11,371 | |
| 2020 | R | 2,799 | 8,970 | 12,045 | |
| 2016 | R | 2,224 | 7,574 | 10,699 | |
| 2012 | R | 3,053 | 7,296 | 10,725 | |
| 2008 | R | 3,586 | 7,483 | 11,433 | |
| 2004 | R | 3,158 | 8,126 | 11,450 | |
| 2000 | R | 2,982 | 7,080 | 10,586 | |
| 1996 | R | 3,318 | 5,194 | 9,875 | |
| 1992 | R | 3,388 | 3,836 | 10,362 | |
| 1988 | R | 3,446 | 5,157 | 8,802 | |
| 1984 | R | 3,254 | 5,352 | 8,761 | |
| 1980 | R | 2,941 | 4,464 | 8,198 | |
| 1976 | D | 3,801 | 3,007 | 6,998 | |
| 1972 | R | 3,134 | 3,618 | 7,122 | |
| 1968 | D | 2,930 | 2,553 | 6,218 | |
| 1964 | D | 4,072 | 2,124 | 6,201 | |
| 1960 | D | 3,472 | 2,365 | 5,877 | |
| 1956 | D | 3,412 | 2,533 | 5,963 | |
| 1952 | D | 4,104 | 3,119 | 7,262 | |
| 1948 | D | 3,632 | 1,960 | 5,773 | |
| 1944 | D | 3,678 | 1,896 | 5,589 | |
| 1940 | D | 4,367 | 1,902 | 6,313 | |
| 1936 | D | 4,193 | 1,035 | 5,276 | |
| 1932 | D | 3,056 | 1,167 | 4,340 | |
| 1928 | R | 1,597 | 2,111 | 3,721 | |
| 1924 | R | 356 | 1,072 | 2,629 | |
| 1920 | R | 643 | 1,582 | 2,389 | |
| 1916 | D | 1,323 | 877 | 2,373 | |
| 1912 | D | 644 | 0 | 1,412 | |
| 1908 | R | 361 | 551 | 1,009 | |
| 1904 | R | 301 | 573 | 914 | |
| 1900 | R | 326 | 549 | 945 | |
| 1896 | D | 528 | 420 | 962 | |
| 1892 | R | 524 | 540 | 1,123 | |
| 1888 | D | 535 | 488 | 1,043 | |
| 1884 | D | 415 | 384 | 821 | |
| 1880 | R | 301 | 323 | 692 | |
| 1876 | R | 227 | 256 | 483 |
Lassen's sparse high-desert population and timber-economy roots produce presidential margins that rival rural counties in Idaho or Wyoming, sitting almost 50 points redder than California's statewide result.
The Democratic margin in Lassen County peaked at sixty points in 1936. By 1980 the county had flipped, voting Republican for the first time in many years. The 2024 margin was fifty-four points, the most Republican-leaning result in the county's modern history.
The economic context is the key. Lassen County's median household income of $67,403 sits well below state and national norms, and 14% 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 Wheatland County and Gooding County.
