| Year | Won | Margin | Democratic | Republican | Total |
|---|---|---|---|---|---|
| 2024 | R | 22,085 | 34,528 | 57,046 | |
| 2020 | R | 23,088 | 34,853 | 59,196 | |
| 2016 | R | 19,091 | 31,594 | 54,234 | |
| 2012 | R | 23,812 | 27,971 | 52,852 | |
| 2008 | D | 29,129 | 28,579 | 58,802 | |
| 2004 | R | 27,257 | 32,434 | 60,944 | |
| 2000 | R | 27,016 | 29,064 | 58,722 | |
| 1996 | D | 26,831 | 21,261 | 56,290 | |
| 1992 | D | 22,645 | 21,222 | 62,789 | |
| 1988 | R | 25,814 | 31,642 | 57,867 | |
| 1984 | R | 22,986 | 39,597 | 62,724 | |
| 1980 | R | 22,871 | 30,081 | 58,756 | |
| 1976 | R | 27,447 | 33,730 | 61,436 | |
| 1972 | R | 26,253 | 37,158 | 63,583 | |
| 1968 | R | 26,431 | 28,561 | 58,507 | |
| 1964 | D | 42,924 | 19,069 | 62,056 | |
| 1960 | R | 28,143 | 37,836 | 66,031 | |
| 1956 | R | 20,269 | 44,149 | 64,418 | |
| 1952 | R | 23,427 | 42,043 | 65,620 | |
| 1948 | R | 20,683 | 29,969 | 52,144 | |
| 1944 | R | 22,086 | 32,824 | 55,174 | |
| 1940 | R | 21,524 | 35,536 | 57,316 | |
| 1936 | R | 23,283 | 30,435 | 54,927 | |
| 1932 | R | 16,914 | 30,479 | 50,275 | |
| 1928 | R | 13,223 | 38,220 | 52,584 | |
| 1924 | R | 5,560 | 29,757 | 41,764 | |
| 1920 | R | 6,781 | 27,618 | 38,587 | |
| 1916 | R | 7,153 | 14,782 | 23,770 | |
| 1912 | R | 4,954 | 7,899 | 21,844 | |
| 1908 | R | 6,158 | 15,739 | 23,985 | |
| 1904 | R | 5,295 | 15,891 | 22,775 | |
| 1900 | R | 6,660 | 15,318 | 22,652 | |
| 1896 | R | 6,581 | 14,325 | 21,507 | |
| 1892 | R | 6,397 | 11,595 | 19,866 | |
| 1888 | — | — | — | — | |
| 1884 | — | — | — | — | |
| 1880 | — | — | — | — | |
| 1876 | — | — | — | — |
Chautauqua County's manufacturing decline and rural demographic weight have driven a decades-long realignment: a county that backed Bill Clinton twice now delivers Republican presidential margins above 20 points.
The Republican margin in Chautauqua County reached its widest at fifty-eight points in 1924. The margin in 2024 was twenty-two points, in line with the county's deep historical pattern.
Chautauqua County's loyalty is rooted in its place. Median household income of $58,351, a 86% non-Hispanic-white share, and a population of 125,544 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 Chippewa County and Cheboygan County.
