| Year | Won | Margin | Democratic | Republican | Total |
|---|---|---|---|---|---|
| 2024 | D | 204,301 | 130,489 | 340,921 | |
| 2020 | D | 238,869 | 136,259 | 382,114 | |
| 2016 | D | 175,696 | 90,326 | 285,790 | |
| 2012 | D | 204,349 | 88,461 | 296,742 | |
| 2008 | D | 214,239 | 88,164 | 306,813 | |
| 2004 | D | 152,500 | 144,157 | 298,547 | |
| 2000 | D | 139,618 | 101,310 | 255,990 | |
| 1996 | D | 143,793 | 85,779 | 255,256 | |
| 1992 | D | 123,908 | 103,937 | 265,841 | |
| 1988 | D | 138,971 | 120,258 | 261,577 | |
| 1984 | R | 107,404 | 140,258 | 250,132 | |
| 1980 | R | 96,472 | 99,596 | 224,995 | |
| 1976 | D | 111,389 | 108,041 | 222,476 | |
| 1972 | R | 76,957 | 132,844 | 209,801 | |
| 1968 | D | 108,141 | 71,259 | 182,194 | |
| 1964 | D | 121,859 | 33,536 | 155,395 | |
| 1960 | D | 68,915 | 65,541 | 134,456 | |
| 1956 | — | — | — | — | |
| 1952 | — | — | — | — | |
| 1948 | — | — | — | — | |
| 1944 | — | — | — | — | |
| 1940 | — | — | — | — | |
| 1936 | — | — | — | — | |
| 1932 | — | — | — | — | |
| 1928 | — | — | — | — | |
| 1924 | — | — | — | — | |
| 1920 | — | — | — | — | |
| 1916 | — | — | — | — | |
| 1912 | — | — | — | — | |
| 1908 | — | — | — | — | |
| 1904 | — | — | — | — | |
| 1900 | — | — | — | — | |
| 1896 | — | — | — | — | |
| 1892 | — | — | — | — | |
| 1888 | — | — | — | — | |
| 1884 | — | — | — | — | |
| 1880 | — | — | — | — | |
| 1876 | — | — | — | — |
Home to nearly two-thirds of Hawaii's population, Honolulu County delivered a 21-point Democratic margin in 2024, driven by a multiracial electorate where Asian Americans — particularly Native Hawaiian, Filipino, and Japanese communities — make up a majority of residents.
The Democratic margin in Honolulu County has been steady. It reached its modern peak at fifty-seven points in 1964; the 2024 margin was twenty-two points, still in line with the county's long pattern.
Honolulu County's political identity is inseparable from its demographic profile: a 18% non-Hispanic-white share, a median household income of $106,195, and the full diversity of a major metropolitan center. The county's voting pattern resembles other major urban centers most closely — Franklin city and Kemper County.