| Year | Won | Margin | Democratic | Republican | Total |
|---|---|---|---|---|---|
| 2024 | R | 12,064 | 35,607 | 48,246 | |
| 2020 | R | 13,359 | 35,726 | 49,860 | |
| 2016 | R | 12,432 | 31,676 | 47,025 | |
| 2012 | R | 19,821 | 25,251 | 46,740 | |
| 2008 | R | 21,882 | 25,585 | 48,699 | |
| 2004 | R | 23,429 | 25,753 | 49,465 | |
| 2000 | R | 20,657 | 21,804 | 44,427 | |
| 1996 | D | 20,716 | 15,386 | 43,629 | |
| 1992 | D | 19,765 | 15,016 | 47,554 | |
| 1988 | D | 21,581 | 21,175 | 43,140 | |
| 1984 | R | 20,155 | 24,552 | 45,110 | |
| 1980 | R | 17,459 | 20,798 | 41,143 | |
| 1976 | D | 23,096 | 22,318 | 46,367 | |
| 1972 | R | 15,683 | 27,308 | 43,602 | |
| 1968 | R | 19,382 | 19,947 | 43,170 | |
| 1964 | D | 28,706 | 15,827 | 44,533 | |
| 1960 | R | 20,037 | 28,414 | 48,451 | |
| 1956 | R | 14,516 | 28,783 | 43,299 | |
| 1952 | R | 19,057 | 26,707 | 45,764 | |
| 1948 | R | 16,588 | 17,724 | 34,538 | |
| 1944 | R | 18,796 | 19,976 | 38,772 | |
| 1940 | D | 22,349 | 21,221 | 43,570 | |
| 1936 | D | 22,664 | 16,986 | 40,198 | |
| 1932 | R | 14,284 | 19,707 | 35,430 | |
| 1928 | R | 7,461 | 26,405 | 34,158 | |
| 1924 | R | 4,685 | 20,483 | 29,272 | |
| 1920 | R | 9,774 | 16,846 | 28,023 | |
| 1916 | R | 7,788 | 8,118 | 17,326 | |
| 1912 | D | 4,816 | 4,601 | 16,091 | |
| 1908 | R | 6,736 | 9,626 | 18,072 | |
| 1904 | R | 4,203 | 11,571 | 17,213 | |
| 1900 | R | 5,997 | 10,255 | 16,942 | |
| 1896 | R | 6,598 | 9,487 | 16,414 | |
| 1892 | R | 5,573 | 7,232 | 13,916 | |
| 1888 | — | — | — | — | |
| 1884 | — | — | — | — | |
| 1880 | — | — | — | — | |
| 1876 | — | — | — | — |
Columbiana County in eastern Ohio sits along the Pennsylvania border in the old Mahoning Valley industrial belt, and its R+49 presidential margin in 2024 reflects a working-class electorate that has moved decisively away from its once-Democratic roots.
The Democratic margin in Columbiana County peaked at twenty-nine points in 1964. By 2000 the county had flipped, voting Republican for the first time in many years. The 2024 margin was forty-nine points, the most Republican-leaning result in the county's modern history.
The economic context is the key. Columbiana County's median household income of $58,180 sits well below state and national norms, and 15% 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 Mason County and St. Francois County.