| Year | Won | Margin | Democratic | Republican | Total |
|---|---|---|---|---|---|
| 2024 | D | 45,142 | 44,763 | 91,034 | |
| 2020 | D | 47,002 | 43,791 | 92,775 | |
| 2016 | R | 39,212 | 40,943 | 86,072 | |
| 2012 | D | 41,970 | 37,641 | 81,565 | |
| 2008 | D | 47,204 | 40,077 | 88,837 | |
| 2004 | D | 46,281 | 43,568 | 91,890 | |
| 2000 | D | 45,381 | 36,946 | 87,084 | |
| 1996 | D | 44,407 | 31,327 | 86,814 | |
| 1992 | D | 43,444 | 34,653 | 99,846 | |
| 1988 | D | 48,130 | 47,610 | 96,365 | |
| 1984 | R | 37,658 | 58,109 | 96,089 | |
| 1980 | R | 37,013 | 39,275 | 89,280 | |
| 1976 | R | 39,827 | 50,340 | 90,658 | |
| 1972 | R | 37,154 | 55,736 | 93,135 | |
| 1968 | R | 37,451 | 46,872 | 89,311 | |
| 1964 | D | 59,021 | 32,048 | 91,139 | |
| 1960 | R | 38,462 | 56,467 | 94,991 | |
| 1956 | R | 23,217 | 67,024 | 90,241 | |
| 1952 | R | 25,833 | 64,738 | 90,717 | |
| 1948 | R | 25,654 | 43,110 | 70,986 | |
| 1944 | R | 31,056 | 44,013 | 75,206 | |
| 1940 | R | 32,092 | 44,013 | 76,284 | |
| 1936 | R | 29,708 | 36,945 | 67,603 | |
| 1932 | R | 22,802 | 32,751 | 56,494 | |
| 1928 | R | 19,563 | 39,860 | 61,092 | |
| 1924 | R | 9,289 | 28,262 | 41,749 | |
| 1920 | R | 9,251 | 24,759 | 35,903 | |
| 1916 | R | 8,906 | 11,445 | 21,456 | |
| 1912 | R | 6,533 | 7,949 | 18,252 | |
| 1908 | R | 6,671 | 10,705 | 18,408 | |
| 1904 | R | 6,480 | 10,853 | 18,230 | |
| 1900 | R | 6,652 | 10,397 | 17,926 | |
| 1896 | R | 5,461 | 10,630 | 16,674 | |
| 1892 | R | 6,040 | 8,259 | 15,773 | |
| 1888 | — | — | — | — | |
| 1884 | — | — | — | — | |
| 1880 | — | — | — | — | |
| 1876 | — | — | — | — |
Broome County, anchored by Binghamton, has shifted sharply from its mid-century Democratic base as deindustrialization reshaped its electorate — the 2024 presidential margin of D+0.4 reflects a county genuinely in play.
The county's recent history is a story of close margins. The Democratic margin reached thirty points in 1964; the Republican margin reached forty-nine points in 1956. Most other elections have been decided by single-digit points.
Broome County's demographics — a population of 197,378, a 80% non-Hispanic-white share, a median household income of $62,616 — 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 Kent County and Russell County.
