| Year | Won | Margin | Democratic | Republican | Total |
|---|---|---|---|---|---|
| 2024 | R | 66,255 | 80,267 | 149,068 | |
| 2020 | R | 62,245 | 77,212 | 141,595 | |
| 2016 | R | 47,085 | 69,076 | 123,486 | |
| 2012 | R | 44,367 | 64,809 | 111,191 | |
| 2008 | R | 48,306 | 63,739 | 113,304 | |
| 2004 | R | 37,928 | 67,648 | 106,082 | |
| 2000 | R | 31,053 | 54,802 | 88,144 | |
| 1996 | R | 28,749 | 43,943 | 78,985 | |
| 1992 | R | 26,635 | 43,447 | 84,573 | |
| 1988 | R | 24,613 | 47,292 | 72,433 | |
| 1984 | R | 21,374 | 49,282 | 71,123 | |
| 1980 | R | 19,789 | 41,152 | 67,260 | |
| 1976 | R | 23,008 | 39,950 | 64,270 | |
| 1972 | R | 14,562 | 42,099 | 57,775 | |
| 1968 | R | 15,467 | 32,908 | 53,472 | |
| 1964 | D | 26,633 | 23,685 | 50,525 | |
| 1960 | R | 15,968 | 35,636 | 51,801 | |
| 1956 | R | 13,651 | 29,468 | 43,272 | |
| 1952 | R | 12,762 | 26,302 | 39,155 | |
| 1948 | R | 11,421 | 18,028 | 29,695 | |
| 1944 | R | 12,068 | 17,782 | 29,984 | |
| 1940 | D | 15,758 | 15,297 | 31,123 | |
| 1936 | D | 18,850 | 14,912 | 34,021 | |
| 1932 | R | 12,086 | 13,098 | 25,751 | |
| 1928 | R | 5,189 | 19,170 | 24,551 | |
| 1924 | R | 7,643 | 10,196 | 19,160 | |
| 1920 | R | 6,455 | 8,579 | 15,674 | |
| 1916 | D | 6,432 | 5,296 | 12,329 | |
| 1912 | D | 5,023 | 2,566 | 11,712 | |
| 1908 | R | 5,403 | 6,261 | 12,192 | |
| 1904 | R | 5,038 | 7,138 | 12,580 | |
| 1900 | R | 5,428 | 5,587 | 11,389 | |
| 1896 | R | 5,202 | 6,178 | 11,812 | |
| 1892 | D | 5,446 | 4,520 | 10,259 | |
| 1888 | — | — | — | — | |
| 1884 | — | — | — | — | |
| 1880 | — | — | — | — | |
| 1876 | — | — | — | — |
Cumberland County sits across the Susquehanna from the state capital, and its growing professional and retiree population has trimmed a once-dominant Republican margin to single digits over the past two decades.
The Republican margin in Cumberland County reached its widest at fifty-seven points in 1928. The margin in 2024 was nine points, in line with the county's deep historical pattern.
Cumberland County's loyalty is rooted in its place. Median household income of $87,494, a 82% non-Hispanic-white share, and a population of 268,323 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 El Paso County and Ottawa County.
