| Year | Won | Margin | Democratic | Republican | Total |
|---|---|---|---|---|---|
| 2024 | D | 10,299 | 4,481 | 15,539 | |
| 2020 | D | 10,240 | 4,163 | 14,915 | |
| 2016 | D | 7,241 | 3,570 | 12,762 | |
| 2012 | D | 8,371 | 3,342 | 11,988 | |
| 2008 | D | 8,914 | 3,515 | 12,668 | |
| 2004 | D | 7,636 | 4,260 | 12,181 | |
| 2000 | D | 5,676 | 4,456 | 11,246 | |
| 1996 | D | 4,997 | 2,705 | 9,186 | |
| 1992 | D | 4,459 | 2,936 | 10,142 | |
| 1988 | R | 3,561 | 4,433 | 8,133 | |
| 1984 | R | 2,746 | 4,674 | 7,526 | |
| 1980 | R | 2,414 | 3,228 | 6,890 | |
| 1976 | R | 2,016 | 3,535 | 5,742 | |
| 1972 | R | 1,659 | 4,164 | 5,935 | |
| 1968 | R | 1,239 | 2,965 | 4,358 | |
| 1964 | D | 2,376 | 2,036 | 4,412 | |
| 1960 | R | 1,032 | 3,272 | 4,304 | |
| 1956 | R | 678 | 3,464 | 4,142 | |
| 1952 | R | 633 | 3,516 | 4,160 | |
| 1948 | R | 816 | 2,344 | 3,181 | |
| 1944 | R | 1,031 | 2,212 | 3,243 | |
| 1940 | R | 1,463 | 2,566 | 4,034 | |
| 1936 | R | 1,279 | 2,846 | 4,137 | |
| 1932 | R | 1,096 | 2,599 | 3,729 | |
| 1928 | R | 576 | 3,262 | 3,854 | |
| 1924 | R | 305 | 2,480 | 2,876 | |
| 1920 | R | 458 | 2,311 | 2,816 | |
| 1916 | R | 643 | 1,474 | 2,196 | |
| 1912 | R | 431 | 852 | 2,364 | |
| 1908 | R | 311 | 1,455 | 1,841 | |
| 1904 | R | 296 | 1,521 | 1,861 | |
| 1900 | R | 418 | 1,742 | 2,201 | |
| 1896 | R | 440 | 2,061 | 2,551 | |
| 1892 | R | 517 | 1,470 | 2,038 | |
| 1888 | — | — | — | — | |
| 1884 | — | — | — | — | |
| 1880 | — | — | — | — | |
| 1876 | — | — | — | — |
Lamoille County's mix of ski-resort towns and small farming communities has produced some of Vermont's most lopsided Democratic presidential margins, with the 2024 result exceeding 35 points despite a relatively sparse population of roughly 23,000.
The unraveling was not abrupt. The Democratic margin in Lamoille County peaked at forty-three points in 2008; it narrowed steadily over the late twentieth century. The 1992 election delivered the county to the Republican party for the first time in many years, by a margin of fifteen points. By 2024, the margin had settled into deep Republican territory.
The economic and demographic context is severe. Lamoille County's median household income of $74,908 is among the lowest of any county in the United States; 9% of residents live below the federal poverty line. The county's voting pattern over the last decade is most similar to that of Windsor County and Bennington County.