| Year | Won | Margin | Democratic | Republican | Total |
|---|---|---|---|---|---|
| 2024 | D | 79,994 | 71,778 | 153,413 | |
| 2020 | D | 81,443 | 66,872 | 150,745 | |
| 2016 | D | 62,285 | 61,821 | 131,018 | |
| 2012 | D | 65,312 | 56,025 | 123,705 | |
| 2008 | D | 71,060 | 59,628 | 132,302 | |
| 2004 | R | 58,232 | 63,372 | 123,881 | |
| 2000 | R | 52,390 | 52,669 | 111,771 | |
| 1996 | D | 47,339 | 41,929 | 103,821 | |
| 1992 | R | 41,655 | 46,709 | 115,328 | |
| 1988 | R | 38,968 | 62,165 | 101,959 | |
| 1984 | R | 32,867 | 70,324 | 103,580 | |
| 1980 | R | 28,616 | 53,616 | 93,007 | |
| 1976 | R | 37,531 | 51,312 | 90,111 | |
| 1972 | R | 27,872 | 64,864 | 92,903 | |
| 1968 | R | 31,025 | 45,032 | 82,067 | |
| 1964 | D | 50,179 | 29,503 | 79,725 | |
| 1960 | R | 29,842 | 46,109 | 76,004 | |
| 1956 | R | 14,876 | 53,840 | 68,716 | |
| 1952 | R | 18,644 | 46,381 | 65,198 | |
| 1948 | R | 17,439 | 34,067 | 53,039 | |
| 1944 | R | 22,778 | 32,890 | 55,826 | |
| 1940 | R | 25,598 | 32,329 | 58,049 | |
| 1936 | R | 24,467 | 28,868 | 54,345 | |
| 1932 | R | 20,374 | 25,757 | 46,871 | |
| 1928 | R | 16,748 | 28,687 | 46,801 | |
| 1924 | R | 8,864 | 22,173 | 34,303 | |
| 1920 | R | 9,938 | 21,152 | 32,246 | |
| 1916 | R | 8,906 | 11,082 | 20,298 | |
| 1912 | R | 8,871 | 8,916 | 20,425 | |
| 1908 | R | 8,961 | 11,132 | 20,775 | |
| 1904 | R | 8,275 | 11,709 | 20,521 | |
| 1900 | R | 7,691 | 11,936 | 20,098 | |
| 1896 | R | 6,634 | 12,127 | 19,422 | |
| 1892 | R | 8,978 | 9,376 | 19,495 | |
| 1888 | — | — | — | — | |
| 1884 | — | — | — | — | |
| 1880 | — | — | — | — | |
| 1876 | — | — | — | — |
Dutchess sits in the mid-Hudson Valley, where an influx of New York City exurbanites has gradually narrowed and reversed a once-reliable Republican margin, leaving it competitive in most statewide races.
The county's recent history is a story of close margins. The Democratic margin reached twenty-six points in 1964; the Republican margin reached fifty-seven points in 1956. Most other elections have been decided by single-digit points.
Dutchess County's demographics — a population of 298,220, a 69% non-Hispanic-white share, a median household income of $99,478 — situate the county close to national averages on several dimensions. The county's voting pattern over the last decade is most similar to that of Oakland County and Hillsborough County.
