| Year | Won | Margin | Democratic | Republican | Total |
|---|---|---|---|---|---|
| 2024 | R | 7,624 | 18,883 | 26,809 | |
| 2020 | R | 7,585 | 18,569 | 26,528 | |
| 2016 | R | 6,309 | 16,021 | 23,530 | |
| 2012 | R | 7,945 | 13,815 | 22,257 | |
| 2008 | R | 9,238 | 13,718 | 23,307 | |
| 2004 | R | 9,024 | 14,472 | 23,659 | |
| 2000 | R | 8,196 | 11,642 | 20,541 | |
| 1996 | R | 8,205 | 8,398 | 19,549 | |
| 1992 | R | 8,230 | 8,545 | 21,554 | |
| 1988 | R | 8,624 | 11,468 | 20,263 | |
| 1984 | R | 9,114 | 13,507 | 22,725 | |
| 1980 | R | 7,800 | 11,547 | 20,604 | |
| 1976 | R | 8,653 | 12,270 | 21,311 | |
| 1972 | R | 6,302 | 13,991 | 20,794 | |
| 1968 | R | 8,319 | 12,323 | 21,949 | |
| 1964 | D | 13,065 | 9,873 | 23,022 | |
| 1960 | R | 8,064 | 17,193 | 25,280 | |
| 1956 | R | 5,594 | 17,107 | 22,715 | |
| 1952 | R | 6,356 | 17,006 | 23,566 | |
| 1948 | R | 5,144 | 11,920 | 17,536 | |
| 1944 | R | 6,426 | 14,916 | 21,646 | |
| 1940 | R | 6,873 | 17,728 | 24,658 | |
| 1936 | R | 9,212 | 17,676 | 27,565 | |
| 1932 | R | 6,174 | 12,230 | 19,088 | |
| 1928 | R | 4,531 | 17,450 | 22,089 | |
| 1924 | R | 1,886 | 10,841 | 14,592 | |
| 1920 | R | 2,669 | 7,718 | 11,746 | |
| 1916 | D | 3,938 | 3,856 | 9,410 | |
| 1912 | D | 2,507 | 1,660 | 9,092 | |
| 1908 | R | 2,815 | 4,868 | 9,788 | |
| 1904 | R | 1,747 | 5,892 | 10,278 | |
| 1900 | R | 4,014 | 5,931 | 11,244 | |
| 1896 | R | 4,599 | 5,133 | 10,304 | |
| 1892 | R | 3,288 | 4,099 | 8,313 | |
| 1888 | — | — | — | — | |
| 1884 | — | — | — | — | |
| 1880 | — | — | — | — | |
| 1876 | — | — | — | — |
Venango County in northwestern Pennsylvania has shifted dramatically since the 1990s, when it was a competitive battleground; by 2024 it delivered a 42-point Republican margin, reflecting the broader rural realignment across the post-industrial Oil Region.
The Democratic margin in Venango County peaked at fourteen points in 1964. By 1968 the county had flipped, voting Republican for the first time in many years. The 2024 margin was forty-two points, the most Republican-leaning result in the county's modern history.
The economic context is the key. Venango County's median household income of $61,522 sits well below state and national norms, and 13% 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 Howell County and Grant County.