Claire McCaskill won with 54.8% of the vote (1,494,125 votes), ahead of W. Todd Akin with 39.1% (1,066,159 votes).
The margin between the first two candidates was 15.7 percentage points (427,966 votes). The party margin (Republican share minus Democratic share) was a Democratic lead of 15.7 points.
Compared with the previous comparable race in the same area, the party margin moved 29.3 points toward Democrats. The winning party changed.
2,725,793 votes were counted in this race, for 3 candidates or options.
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