| Year | Won | Margin | Democratic | Republican | Total |
|---|---|---|---|---|---|
| 2024 | R | 36,995 | 42,391 | 81,271 | |
| 2020 | R | 39,457 | 43,153 | 83,595 | |
| 2016 | R | 28,898 | 38,712 | 71,660 | |
| 2012 | R | 26,876 | 38,687 | 66,624 | |
| 2008 | R | 29,776 | 39,092 | 69,849 | |
| 2004 | R | 26,050 | 39,888 | 66,680 | |
| 2000 | R | 21,387 | 32,210 | 56,455 | |
| 1996 | R | 18,446 | 26,379 | 51,727 | |
| 1992 | R | 15,423 | 25,130 | 53,974 | |
| 1988 | R | 13,758 | 31,907 | 46,182 | |
| 1984 | R | 10,972 | 29,737 | 41,079 | |
| 1980 | R | 10,029 | 21,403 | 36,430 | |
| 1976 | R | 12,592 | 19,616 | 32,966 | |
| 1972 | R | 9,031 | 21,282 | 30,856 | |
| 1968 | R | 8,755 | 15,851 | 27,439 | |
| 1964 | D | 15,091 | 10,173 | 25,283 | |
| 1960 | R | 8,863 | 15,842 | 24,731 | |
| 1956 | R | 5,957 | 16,150 | 22,193 | |
| 1952 | R | 6,878 | 14,439 | 21,400 | |
| 1948 | R | 6,515 | 10,654 | 17,509 | |
| 1944 | R | 6,774 | 9,843 | 16,652 | |
| 1940 | R | 7,872 | 10,284 | 18,203 | |
| 1936 | D | 9,526 | 8,832 | 18,409 | |
| 1932 | R | 7,531 | 8,476 | 16,326 | |
| 1928 | R | 4,225 | 11,820 | 16,076 | |
| 1924 | R | 5,103 | 8,940 | 14,747 | |
| 1920 | R | 6,067 | 7,443 | 13,686 | |
| 1916 | D | 4,462 | 3,408 | 7,984 | |
| 1912 | D | 4,103 | 1,970 | 7,688 | |
| 1908 | D | 4,737 | 3,733 | 8,673 | |
| 1904 | D | 4,361 | 3,856 | 8,646 | |
| 1900 | D | 5,136 | 3,873 | 9,380 | |
| 1896 | D | 4,992 | 4,264 | 9,646 | |
| 1892 | D | 5,120 | 3,449 | 9,292 | |
| 1888 | — | — | — | — | |
| 1884 | — | — | — | — | |
| 1880 | — | — | — | — | |
| 1876 | — | — | — | — |
Hunterdon's affluent, low-density exurbs west of the Raritan River have trended measurably toward Democrats over three presidential cycles, narrowing a margin that once reached double digits, though Republicans held a 6.7-point edge in 2024.
The Republican margin in Hunterdon County reached its widest at forty-seven points in 1928. The margin in 2024 was seven points, in line with the county's deep historical pattern.
Hunterdon County's loyalty is rooted in its place. Median household income of $141,715, a 81% non-Hispanic-white share, and a population of 130,160 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 York County and Delaware County.
