| Year | Won | Margin | Democratic | Republican | Total |
|---|---|---|---|---|---|
| 2024 | D | 2,940 | 1,893 | 5,001 | |
| 2020 | D | 2,905 | 1,810 | 4,851 | |
| 2016 | D | 2,094 | 1,487 | 4,109 | |
| 2012 | D | 2,531 | 1,471 | 4,075 | |
| 2008 | D | 2,694 | 1,490 | 4,269 | |
| 2004 | D | 2,246 | 1,754 | 4,077 | |
| 2000 | D | 1,835 | 1,550 | 3,638 | |
| 1996 | D | 1,555 | 958 | 3,041 | |
| 1992 | D | 1,444 | 1,012 | 3,379 | |
| 1988 | D | 1,369 | 1,316 | 2,728 | |
| 1984 | R | 980 | 1,537 | 2,550 | |
| 1980 | D | 999 | 947 | 2,240 | |
| 1976 | R | 866 | 1,004 | 1,909 | |
| 1972 | R | 743 | 1,259 | 2,018 | |
| 1968 | R | 730 | 754 | 1,559 | |
| 1964 | D | 996 | 506 | 1,503 | |
| 1960 | D | 819 | 798 | 1,617 | |
| 1956 | R | 604 | 978 | 1,582 | |
| 1952 | R | 665 | 976 | 1,650 | |
| 1948 | D | 822 | 724 | 1,563 | |
| 1944 | D | 801 | 667 | 1,468 | |
| 1940 | D | 998 | 716 | 1,719 | |
| 1936 | D | 852 | 712 | 1,568 | |
| 1932 | D | 811 | 649 | 1,477 | |
| 1928 | R | 801 | 830 | 1,642 | |
| 1924 | R | 343 | 861 | 1,320 | |
| 1920 | R | 354 | 928 | 1,296 | |
| 1916 | D | 434 | 407 | 845 | |
| 1912 | D | 210 | 193 | 622 | |
| 1908 | R | 188 | 364 | 566 | |
| 1904 | R | 109 | 343 | 466 | |
| 1900 | R | 146 | 356 | 517 | |
| 1896 | R | 158 | 426 | 617 | |
| 1892 | R | 177 | 349 | 539 | |
| 1888 | — | — | — | — | |
| 1884 | — | — | — | — | |
| 1880 | — | — | — | — | |
| 1876 | — | — | — | — |
Grand Isle's chain of lake islands gives it a distinct geography among Vermont's 14 counties, and its roughly 6,900 residents backed the Democratic presidential nominee by about 21 points in 2024, broadly in line with statewide trends.
The Democratic margin in Grand Isle County reached its widest at thirty-three points in 1964. The margin in 2024 was twenty-one points — still decisive.
Grand Isle County's loyalty is rooted in its place. Median household income of $97,396, a 91% non-Hispanic-white share, and a population of 7,450 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 Thurston County and Addison County.
