| Year | Won | Margin | Democratic | Republican | Total |
|---|---|---|---|---|---|
| 2024 | D | 192,668 | 172,720 | 372,930 | |
| 2020 | D | 187,915 | 165,741 | 361,048 | |
| 2016 | R | 138,683 | 148,180 | 310,894 | |
| 2012 | R | 133,408 | 155,925 | 294,206 | |
| 2008 | D | 149,909 | 148,336 | 303,235 | |
| 2004 | R | 116,909 | 171,201 | 290,891 | |
| 2000 | R | 95,442 | 148,602 | 250,318 | |
| 1996 | R | 85,912 | 121,335 | 223,379 | |
| 1992 | R | 82,305 | 115,285 | 242,553 | |
| 1988 | R | 73,467 | 131,910 | 206,842 | |
| 1984 | R | 66,238 | 137,417 | 205,020 | |
| 1980 | R | 72,790 | 112,604 | 206,290 | |
| 1976 | R | 59,000 | 126,805 | 188,633 | |
| 1972 | R | 67,587 | 104,041 | 175,461 | |
| 1968 | R | 61,891 | 85,810 | 159,850 | |
| 1964 | D | 86,860 | 66,830 | 153,959 | |
| 1960 | R | 61,313 | 95,477 | 157,296 | |
| 1956 | R | 48,871 | 94,969 | 144,482 | |
| 1952 | R | 47,221 | 79,647 | 128,315 | |
| 1948 | R | 43,205 | 53,669 | 98,776 | |
| 1944 | R | 43,679 | 54,163 | 99,116 | |
| 1940 | R | 48,196 | 53,131 | 102,076 | |
| 1936 | D | 44,823 | 36,633 | 85,304 | |
| 1932 | R | 41,601 | 42,186 | 86,723 | |
| 1928 | R | 18,229 | 56,573 | 75,310 | |
| 1924 | R | 7,982 | 45,207 | 59,008 | |
| 1920 | R | 14,763 | 40,802 | 58,175 | |
| 1916 | D | 20,364 | 16,095 | 37,903 | |
| 1912 | D | 9,412 | 6,498 | 31,926 | |
| 1908 | R | 11,445 | 16,576 | 29,901 | |
| 1904 | R | 6,430 | 20,254 | 28,277 | |
| 1900 | R | 13,775 | 17,861 | 32,598 | |
| 1896 | R | 13,582 | 17,053 | 31,384 | |
| 1892 | R | 11,533 | 12,388 | 26,750 | |
| 1888 | — | — | — | — | |
| 1884 | — | — | — | — | |
| 1880 | — | — | — | — | |
| 1876 | — | — | — | — |
Once reliably Republican, Kent County's urban-suburban shift around Grand Rapids has gradually narrowed margins, flipping the county to a modest Democratic lean in recent presidential cycles while remaining a genuine battleground at other levels.
The Democratic margin in Kent County has rarely exceeded thirteen points in modern history; the Republican margin has rarely exceeded sixty-three points. 2024 delivered the county to the Democratic candidate by five points.
Kent County's demographics resemble the country more than they resemble most counties. A 73% non-Hispanic-white share, a 10% poverty rate, and a median household income of $82,631 — all within the broad national range. The county's voting pattern over the last decade is most similar to that of Frederick County and Chesterfield County.
