| Year | Won | Margin | Democratic | Republican | Total |
|---|---|---|---|---|---|
| 2024 | R | 5,483 | 13,826 | 19,529 | |
| 2020 | R | 6,048 | 14,135 | 20,716 | |
| 2016 | R | 4,882 | 12,525 | 18,692 | |
| 2012 | R | 6,139 | 10,390 | 16,953 | |
| 2008 | R | 7,016 | 11,013 | 18,406 | |
| 2004 | R | 6,566 | 12,310 | 19,270 | |
| 2000 | R | 6,336 | 11,436 | 18,690 | |
| 1996 | R | 6,621 | 8,107 | 17,703 | |
| 1992 | R | 4,848 | 8,976 | 18,719 | |
| 1988 | R | 5,614 | 11,880 | 17,626 | |
| 1984 | R | 4,720 | 14,527 | 19,304 | |
| 1980 | R | 5,879 | 10,423 | 17,640 | |
| 1976 | R | 6,134 | 11,769 | 18,010 | |
| 1972 | R | 4,812 | 13,426 | 18,284 | |
| 1968 | R | 4,986 | 11,222 | 17,145 | |
| 1964 | D | 10,329 | 7,688 | 18,039 | |
| 1960 | R | 5,280 | 14,408 | 19,695 | |
| 1956 | R | 3,668 | 16,068 | 19,736 | |
| 1952 | R | 3,943 | 16,365 | 20,324 | |
| 1948 | R | 4,711 | 12,689 | 17,639 | |
| 1944 | R | 4,786 | 13,454 | 18,279 | |
| 1940 | R | 5,077 | 15,611 | 20,767 | |
| 1936 | R | 5,288 | 13,829 | 19,508 | |
| 1932 | R | 4,961 | 12,348 | 17,777 | |
| 1928 | R | 3,491 | 15,306 | 19,399 | |
| 1924 | R | 2,755 | 12,203 | 16,196 | |
| 1920 | R | 2,799 | 10,898 | 14,697 | |
| 1916 | R | 3,191 | 6,308 | 10,081 | |
| 1912 | R | 2,777 | 3,668 | 9,864 | |
| 1908 | R | 3,390 | 7,504 | 11,609 | |
| 1904 | R | 2,718 | 7,835 | 11,365 | |
| 1900 | R | 3,621 | 7,200 | 11,603 | |
| 1896 | R | 3,895 | 7,079 | 11,508 | |
| 1892 | R | 3,128 | 5,678 | 10,889 | |
| 1888 | — | — | — | — | |
| 1884 | — | — | — | — | |
| 1880 | — | — | — | — | |
| 1876 | — | — | — | — |
Allegany's rural Southern Tier landscape and small-town demographics have produced Republican presidential margins above 40 points in recent cycles, making it a consistent outlier in a state that trends heavily Democratic statewide.
The Democratic margin in Allegany County peaked at fifteen points in 1964. By 1968 the county had flipped, voting Republican for the first time in many years. The 2024 margin was forty-three points, the most Republican-leaning result in the county's modern history.
The economic context is the key. Allegany County's median household income of $62,869 sits well below state and national norms, and 16% 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 Logan County and Madison County.