| Year | Won | Margin | Democratic | Republican | Total |
|---|---|---|---|---|---|
| 2024 | R | 103,958 | 123,941 | 234,871 | |
| 2020 | R | 106,869 | 122,488 | 235,084 | |
| 2016 | R | 73,509 | 95,138 | 186,024 | |
| 2012 | R | 66,818 | 99,921 | 171,711 | |
| 2008 | R | 75,112 | 94,647 | 173,812 | |
| 2004 | R | 55,573 | 95,969 | 153,278 | |
| 2000 | R | 42,449 | 69,835 | 117,799 | |
| 1996 | R | 34,981 | 49,808 | 94,427 | |
| 1992 | R | 30,783 | 38,298 | 91,366 | |
| 1988 | R | 27,516 | 42,096 | 70,642 | |
| 1984 | R | 21,294 | 38,035 | 60,427 | |
| 1980 | R | 17,311 | 28,179 | 51,440 | |
| 1976 | D | 21,026 | 18,154 | 40,311 | |
| 1972 | R | 16,911 | 18,597 | 36,945 | |
| 1968 | D | 14,050 | 12,427 | 29,144 | |
| 1964 | D | 18,256 | 9,389 | 27,676 | |
| 1960 | D | 13,304 | 10,439 | 23,863 | |
| 1956 | D | 10,611 | 9,059 | 19,739 | |
| 1952 | R | 8,887 | 9,104 | 18,153 | |
| 1948 | D | 8,837 | 5,570 | 15,109 | |
| 1944 | D | 7,149 | 4,196 | 11,409 | |
| 1940 | D | 8,402 | 3,887 | 12,436 | |
| 1936 | D | 7,959 | 2,321 | 10,388 | |
| 1932 | D | 6,200 | 2,242 | 8,683 | |
| 1928 | D | 3,685 | 3,669 | 7,450 | |
| 1924 | R | 390 | 2,192 | 5,984 | |
| 1920 | R | 1,559 | 2,894 | 4,869 | |
| 1916 | D | 3,375 | 1,954 | 5,791 | |
| 1912 | D | 1,823 | 0 | 4,357 | |
| 1908 | R | 1,491 | 1,865 | 3,625 | |
| 1904 | R | 1,023 | 2,050 | 3,274 | |
| 1900 | R | 1,592 | 2,009 | 3,677 | |
| 1896 | R | 1,721 | 1,890 | 3,676 | |
| 1892 | R | 1,524 | 1,743 | 3,538 | |
| 1888 | R | 1,547 | 1,761 | 3,364 | |
| 1884 | R | 1,483 | 1,749 | 3,307 | |
| 1880 | R | 1,416 | 1,643 | 3,117 | |
| 1876 | R | 1,278 | 1,610 | 2,888 |
Placer County's rapid growth from Sacramento exurban sprawl has kept it reliably Republican by high single digits even as neighboring counties shifted, making it an outlier in a state that has trended decisively blue at the presidential level.
The Republican margin in Placer County reached its widest at thirty-one points in 1904. The margin in 2024 was nine points, in line with the county's deep historical pattern.
Placer County's loyalty is rooted in its place. Median household income of $115,998, a 69% non-Hispanic-white share, and a population of 419,156 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 Denton County and El Dorado County.
