| Party Party Candidate Votes % ± | |
| - Democratic Jon Tester 199,845 49.16% +1.92% | |
| - Republican Conrad Burns (incumbent) 196,283 48.29% 2.27% | |
| - Libertarian Stan Jones 10,377 2.55% - | |
| Majority Majority Majority 3,562 0.88% 2.44% | |
| Turnout Turnout Turnout 406,505 - - | |
| - Democratic gain from Republican Democratic gain from Republican Swing - - | |