| Year | Won | Margin | Democratic | Republican | Total |
|---|---|---|---|---|---|
| 2024 | D | 235,169 | 188,194 | 439,581 | |
| 2020 | D | 249,506 | 197,730 | 464,081 | |
| 2016 | D | 172,538 | 146,824 | 360,017 | |
| 2012 | D | 186,430 | 148,467 | 344,932 | |
| 2008 | D | 181,824 | 141,673 | 329,520 | |
| 2004 | D | 158,231 | 150,783 | 313,793 | |
| 2000 | D | 138,249 | 118,431 | 268,926 | |
| 1996 | D | 120,893 | 89,295 | 239,073 | |
| 1992 | D | 102,243 | 77,410 | 241,149 | |
| 1988 | D | 96,688 | 94,167 | 194,473 | |
| 1984 | R | 79,498 | 112,877 | 195,108 | |
| 1980 | R | 64,444 | 90,247 | 176,511 | |
| 1976 | D | 78,238 | 74,668 | 159,148 | |
| 1972 | R | 56,933 | 84,265 | 148,065 | |
| 1968 | D | 72,670 | 51,436 | 135,718 | |
| 1964 | D | 84,566 | 40,164 | 125,973 | |
| 1960 | D | 64,292 | 57,188 | 123,475 | |
| 1956 | D | 57,728 | 57,078 | 115,544 | |
| 1952 | R | 56,132 | 56,515 | 113,811 | |
| 1948 | D | 50,674 | 34,396 | 90,786 | |
| 1944 | D | 53,269 | 31,626 | 86,370 | |
| 1940 | D | 51,670 | 27,188 | 80,311 | |
| 1936 | D | 48,988 | 18,331 | 69,891 | |
| 1932 | D | 38,451 | 19,006 | 65,327 | |
| 1928 | R | 17,402 | 35,748 | 54,146 | |
| 1924 | R | 4,232 | 21,376 | 44,818 | |
| 1920 | R | 8,259 | 22,048 | 42,491 | |
| 1916 | D | 18,940 | 16,780 | 38,770 | |
| 1912 | D | 6,855 | 6,517 | 31,657 | |
| 1908 | R | 4,936 | 10,935 | 17,974 | |
| 1904 | R | 2,351 | 9,773 | 13,836 | |
| 1900 | R | 3,702 | 6,269 | 10,589 | |
| 1896 | D | 5,570 | 4,651 | 10,303 | |
| 1892 | R | 3,621 | 3,954 | 10,665 | |
| 1888 | — | — | — | — | |
| 1884 | — | — | — | — | |
| 1880 | — | — | — | — | |
| 1876 | — | — | — | — |
Home to one of the largest U.S. military installations in the Pacific Northwest, Pierce County posts Democratic margins well below King and Snohomish, with a working-class Tacoma core and fast-growing suburban precincts pulling in different directions.
The Democratic margin in Pierce County reached its widest at forty-four points in 1936. The margin in 2024 was eleven points — still decisive.
Pierce County's loyalty is rooted in its place. Median household income of $99,564, a 64% non-Hispanic-white share, and a population of 930,319 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 Adams County and Clay County.
