1857 United States Senate election in Massachusetts

1857 United States Senate election in Massachusetts
January 9–13, 1857

Majority vote of each house needed to win
 
Nominee Charles Sumner
Party Republican
Senate unanimous
Percentage unanimous
House 333
Percentage 96.52%

Senator before election

Charles Sumner
Free Soil

Elected Senator

Charles Sumner
Republican

The 1857 United States Senate election in Massachusetts was held in January 1857. Incumbent Charles Sumner was re-elected to a second term in office as a member of the Republican Party. Sumner was elected in 1851 by a single vote after twenty-five inconclusive ballots by a coalition of Free-Soil and Democratic legislators. He had since become a founding member of the Massachusetts Republican Party.

At the time, Massachusetts elected United States senators by a majority vote of each separate house of the Massachusetts General Court: the House and the Senate.

During the election, Sumner was still recovering from a brutal attack by a fellow member of Congress, Preston Brooks. He would not permanently return to the Senate until 1859.