| Year | Won | Margin | Democratic | Republican | Total |
|---|---|---|---|---|---|
| 2024 | R | 65,880 | 83,543 | 150,825 | |
| 2020 | D | 75,802 | 73,186 | 150,369 | |
| 2016 | D | 69,342 | 60,911 | 135,087 | |
| 2012 | D | 65,793 | 57,428 | 124,645 | |
| 2008 | D | 69,543 | 61,752 | 132,193 | |
| 2004 | R | 64,191 | 65,130 | 131,231 | |
| 2000 | D | 69,530 | 48,441 | 122,590 | |
| 1996 | D | 63,127 | 40,395 | 112,241 | |
| 1992 | D | 56,759 | 49,608 | 121,831 | |
| 1988 | R | 47,634 | 63,825 | 112,301 | |
| 1984 | R | 44,687 | 70,020 | 115,018 | |
| 1980 | R | 35,277 | 59,068 | 104,993 | |
| 1976 | R | 48,673 | 52,087 | 101,540 | |
| 1972 | R | 35,771 | 64,753 | 100,720 | |
| 1968 | R | 36,948 | 40,880 | 83,307 | |
| 1964 | D | 46,173 | 26,187 | 72,442 | |
| 1960 | R | 27,178 | 33,107 | 60,398 | |
| 1956 | R | 13,881 | 34,049 | 47,930 | |
| 1952 | R | 15,084 | 27,657 | 42,973 | |
| 1948 | R | 13,066 | 20,661 | 35,728 | |
| 1944 | R | 13,437 | 19,471 | 32,999 | |
| 1940 | R | 14,897 | 20,040 | 35,299 | |
| 1936 | D | 15,876 | 15,583 | 32,090 | |
| 1932 | R | 13,347 | 13,963 | 27,982 | |
| 1928 | R | 9,769 | 15,732 | 26,072 | |
| 1924 | R | 5,640 | 11,915 | 19,559 | |
| 1920 | R | 5,057 | 11,169 | 16,897 | |
| 1916 | R | 4,469 | 5,041 | 9,659 | |
| 1912 | D | 4,241 | 2,221 | 9,048 | |
| 1908 | R | 3,937 | 4,857 | 9,227 | |
| 1904 | R | 4,246 | 4,283 | 8,742 | |
| 1900 | R | 4,021 | 4,187 | 8,347 | |
| 1896 | R | 3,002 | 4,336 | 7,614 | |
| 1892 | D | 3,789 | 2,909 | 7,093 | |
| 1888 | — | — | — | — | |
| 1884 | — | — | — | — | |
| 1880 | — | — | — | — | |
| 1876 | — | — | — | — |
Rockland County's large Orthodox Jewish and Hasidic communities have driven a pronounced rightward realignment over the past decade, producing an R+11.8 margin in 2024 in a county that voted Democratic as recently as 2012.
The Democratic margin in Rockland County has rarely exceeded twenty-eight points in modern history; the Republican margin has rarely exceeded forty-two points. 2024 delivered the county to the Republican candidate by twelve points.
Rockland County's demographics resemble the country more than they resemble most counties. A 62% non-Hispanic-white share, a 16% poverty rate, and a median household income of $109,959 — all within the broad national range. The county's voting pattern over the last decade is most similar to that of Nassau County and Gloucester County.
