Dewey took a landslide 61.54% of the vote to Truman's 36.92%, a victory margin of 24.61%. Progressive Party candidate Henry A. Wallace came in a distant third with 1.04%.
Vermont historically was a bastion of liberalNortheastern Republicanism, and by 1948 the Green Mountain State had gone Republican in every presidential election since the founding of the Republican Party. From 1856 to 1944, Vermont had had the longest streak of voting Republican of any state, having never voted Democratic before, and this tradition easily continued in 1948 with Dewey's decisive win.
Vermont had been one of only two states (along with Maine) to reject Democrat Franklin D. Roosevelt in all four of his presidential campaigns, even in the nationwide Democratic landslides of 1932 and 1936. But FDR had improved dramatically on previous Democrats' performances in Vermont, and in an opposite trend of the nation, had actually been more Democratic in the 1940s than in either of the 1930s landslides, with Roosevelt coming within 10 points of winning Vermont in 1940. Thus Dewey's decisive win with 61.54% marked the first time since 1928 that a Republican would break 60% of the vote in Vermont.
Dewey carried 11 of the state's 14 counties, breaking 60% in 9 of them, and in 5 of those even broke 70%. But the three northwestern counties of Vermont had been Democratic enclaves in an otherwise Republican state throughout the 1930s and 1940s, and Truman once again won Chittenden County, Franklin County and Grand Isle County for the Democrats. Dewey did manage to win back sparsely populated Essex County, in the northeast of the state, which had defected to the Democrats and voted for Roosevelt in 1940 and 1944.