| Year | Won | Margin | Democratic | Republican | Total |
|---|---|---|---|---|---|
| 2024 | D | 44,200 | 42,432 | 87,934 | |
| 2020 | D | 44,552 | 41,009 | 87,025 | |
| 2016 | R | 33,351 | 36,991 | 74,260 | |
| 2012 | D | 35,527 | 32,135 | 68,672 | |
| 2008 | D | 36,392 | 29,827 | 66,925 | |
| 2004 | R | 23,875 | 31,578 | 55,991 | |
| 2000 | R | 22,790 | 24,081 | 48,254 | |
| 1996 | D | 18,327 | 15,932 | 39,252 | |
| 1992 | R | 15,364 | 15,562 | 40,238 | |
| 1988 | R | 12,996 | 19,923 | 33,113 | |
| 1984 | R | 11,789 | 21,531 | 33,403 | |
| 1980 | R | 12,884 | 14,882 | 29,862 | |
| 1976 | D | 16,523 | 12,604 | 29,428 | |
| 1972 | R | 10,463 | 17,712 | 28,556 | |
| 1968 | R | 9,055 | 11,082 | 24,888 | |
| 1964 | D | 12,981 | 9,006 | 22,054 | |
| 1960 | D | 10,754 | 10,697 | 21,616 | |
| 1956 | R | 9,319 | 10,303 | 19,745 | |
| 1952 | R | 9,874 | 10,144 | 20,108 | |
| 1948 | R | 8,174 | 8,501 | 16,790 | |
| 1944 | D | 7,900 | 7,069 | 15,026 | |
| 1940 | D | 9,226 | 8,079 | 17,305 | |
| 1936 | D | 9,588 | 7,389 | 17,005 | |
| 1932 | D | 8,829 | 6,597 | 15,490 | |
| 1928 | R | 5,727 | 8,335 | 14,089 | |
| 1924 | D | 6,936 | 6,894 | 14,022 | |
| 1920 | D | 7,211 | 6,511 | 13,889 | |
| 1916 | D | 4,210 | 3,813 | 8,089 | |
| 1912 | D | 4,071 | 3,192 | 7,936 | |
| 1908 | R | 4,095 | 4,158 | 8,357 | |
| 1904 | — | — | — | — | |
| 1900 | — | — | — | — | |
| 1896 | — | — | — | — | |
| 1892 | — | — | — | — | |
| 1888 | — | — | — | — | |
| 1884 | — | — | — | — | |
| 1880 | — | — | — | — | |
| 1876 | — | — | — | — |
Kent County sits between Wilmington's Democratic suburbs and Sussex County's rural Republican base, making it Delaware's most contested ground — its 2024 D+2.0 margin reflects a constituency almost perfectly divided along urban-rural lines within a single county seat.
The Democratic margin in Kent County has rarely exceeded eighteen points in modern history; the Republican margin has rarely exceeded twenty-nine points. 2024 delivered the county to the Democratic candidate by two points.
Kent County's demographics resemble the country more than they resemble most counties. A 58% non-Hispanic-white share, a 11% poverty rate, and a median household income of $74,477 — all within the broad national range. The county's voting pattern over the last decade is most similar to that of Saratoga County and Eaton County.
