| Year | Won | Margin | Democratic | Republican | Total |
|---|---|---|---|---|---|
| 2024 | R | 13,031 | 15,256 | 28,592 | |
| 2020 | R | 12,975 | 14,382 | 28,010 | |
| 2016 | R | 10,451 | 13,308 | 25,668 | |
| 2012 | D | 12,117 | 11,461 | 24,139 | |
| 2008 | D | 13,570 | 12,026 | 26,121 | |
| 2004 | R | 12,723 | 13,342 | 26,652 | |
| 2000 | R | 11,460 | 12,219 | 25,358 | |
| 1996 | D | 11,470 | 8,774 | 24,126 | |
| 1992 | D | 10,471 | 10,141 | 26,606 | |
| 1988 | R | 11,069 | 13,021 | 24,335 | |
| 1984 | R | 9,582 | 16,777 | 26,511 | |
| 1980 | R | 8,795 | 11,814 | 23,907 | |
| 1976 | R | 9,787 | 14,796 | 24,754 | |
| 1972 | R | 7,898 | 17,364 | 25,321 | |
| 1968 | R | 7,981 | 13,543 | 22,696 | |
| 1964 | D | 15,190 | 8,643 | 23,859 | |
| 1960 | R | 7,899 | 17,422 | 25,347 | |
| 1956 | R | 5,644 | 19,484 | 25,128 | |
| 1952 | R | 6,115 | 20,304 | 26,458 | |
| 1948 | R | 7,174 | 15,437 | 23,197 | |
| 1944 | R | 7,849 | 15,427 | 23,313 | |
| 1940 | R | 7,798 | 16,771 | 24,647 | |
| 1936 | R | 7,807 | 16,682 | 24,765 | |
| 1932 | R | 8,114 | 14,904 | 23,265 | |
| 1928 | R | 6,006 | 18,286 | 24,606 | |
| 1924 | R | 5,841 | 13,573 | 20,670 | |
| 1920 | R | 6,275 | 12,112 | 18,961 | |
| 1916 | D | 5,975 | 5,926 | 12,304 | |
| 1912 | D | 5,338 | 5,138 | 12,641 | |
| 1908 | R | 5,975 | 7,459 | 13,977 | |
| 1904 | R | 5,725 | 7,770 | 14,014 | |
| 1900 | R | 6,142 | 7,893 | 14,394 | |
| 1896 | R | 5,820 | 8,161 | 14,477 | |
| 1892 | R | 6,408 | 7,095 | 14,336 | |
| 1888 | — | — | — | — | |
| 1884 | — | — | — | — | |
| 1880 | — | — | — | — | |
| 1876 | — | — | — | — |
Otsego County, home to Cooperstown and a patchwork of small farms and college towns, delivered an R+7.8 margin in 2024—a notable shift for a county that was competitive as recently as the early 2000s.
The Democratic margin in Otsego County has rarely exceeded twenty-seven points in modern history; the Republican margin has rarely exceeded fifty-five points. 2024 delivered the county to the Republican candidate by eight points.
Otsego County's demographics resemble the country more than they resemble most counties. A 89% non-Hispanic-white share, a 13% poverty rate, and a median household income of $68,885 — all within the broad national range. The county's voting pattern over the last decade is most similar to that of Penobscot County and Seneca County.
