Edward J. Markey won with 66.2% of the vote (2,357,809 votes), ahead of Kevin J. O'Conner with 33.0% (1,177,765 votes).
The margin between the first two candidates was 33.1 percentage points (1,180,044 votes). The party margin (Republican share minus Democratic share) was a Democratic lead of 32.5 points.
Compared with the previous comparable race in the same area, the party margin moved 8.4 points toward Democrats.
3,564,136 votes were counted in this race, for 3 candidates or options.
More races: all races, candidates and analysis.