| Year | Won | Margin | Democratic | Republican | Total |
|---|---|---|---|---|---|
| 2024 | R | 37,196 | 56,837 | 95,194 | |
| 2020 | R | 38,122 | 54,759 | 94,122 | |
| 2016 | R | 32,531 | 48,167 | 84,462 | |
| 2012 | R | 37,055 | 42,344 | 80,793 | |
| 2008 | R | 40,499 | 42,895 | 84,488 | |
| 2004 | D | 42,146 | 39,916 | 82,543 | |
| 2000 | D | 38,925 | 32,491 | 73,649 | |
| 1996 | D | 39,578 | 26,048 | 74,279 | |
| 1992 | D | 44,877 | 21,361 | 82,340 | |
| 1988 | D | 50,327 | 25,764 | 76,469 | |
| 1984 | D | 54,765 | 32,052 | 87,117 | |
| 1980 | D | 43,955 | 30,496 | 79,765 | |
| 1976 | D | 46,117 | 33,593 | 81,150 | |
| 1972 | R | 31,570 | 43,637 | 77,337 | |
| 1968 | D | 45,396 | 28,264 | 82,028 | |
| 1964 | D | 60,492 | 23,174 | 83,993 | |
| 1960 | D | 47,182 | 36,796 | 84,190 | |
| 1956 | R | 36,373 | 38,263 | 74,715 | |
| 1952 | D | 38,136 | 31,700 | 70,170 | |
| 1948 | D | 26,629 | 22,324 | 50,936 | |
| 1944 | D | 32,743 | 23,555 | 56,658 | |
| 1940 | D | 33,609 | 24,324 | 58,215 | |
| 1936 | D | 37,205 | 20,223 | 58,312 | |
| 1932 | D | 19,805 | 19,751 | 41,260 | |
| 1928 | R | 11,868 | 27,949 | 40,217 | |
| 1924 | R | 3,220 | 16,768 | 26,141 | |
| 1920 | R | 4,771 | 11,691 | 18,586 | |
| 1916 | R | 5,805 | 6,864 | 14,103 | |
| 1912 | D | 3,037 | 2,759 | 12,602 | |
| 1908 | R | 4,200 | 7,008 | 12,526 | |
| 1904 | R | 2,342 | 7,122 | 10,340 | |
| 1900 | R | 4,076 | 6,759 | 11,244 | |
| 1896 | R | 4,322 | 6,842 | 11,412 | |
| 1892 | R | 3,822 | 4,890 | 9,396 | |
| 1888 | — | — | — | — | |
| 1884 | — | — | — | — | |
| 1880 | — | — | — | — | |
| 1876 | — | — | — | — |
Beaver County's industrial Ohio River corridor has shifted dramatically rightward over two decades; in 2024 it delivered a 20-point Republican presidential margin in a county that voted Democratic as recently as 2008.
The 2008 election was the turning point, when the Republican candidate carried the county by three points. The 2024 margin was twenty-one points, in line with the county's new direction.
The demographics suggest why. A population of 166,324, a 87% non-Hispanic-white share, and a median household income of $71,089 situate the county in the broader realignment patterns of recent cycles. The county's voting pattern over the last decade is most similar to that of Washington County and Fayette County.
