The 1855 United States Senate special election in Massachusetts was held during January 1855. Henry Wilson was elected to fill the remainder of the term left vacant by the resignation of Edward Everett.

Quick Facts 40 members of the Massachusetts Senate396 members of the Massachusetts House Majority vote of both houses needed to win, Nominee ...

1855 United States Senate special election in Massachusetts

← 1853 January 23 and 31, 1855 1859 →
40 members of the Massachusetts Senate 396 members of the Massachusetts House Majority vote of both houses needed to win
Nominee Henry Wilson Party Know Nothing Senate 21 Percentage 52.5% House 234 Percentage 57.8%
U.S. senator before election Julius Rockwell Whig Elected U.S. senator Henry Wilson Know Nothing

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Everett had resigned in 1854 over poor health and protest following his failure to vote against the Kansas-Nebraska Act. Prior to the election, Julius Rockwell had been appointed to the seat on an interim basis.^[1]

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.

In 1854, the anti-immigration, anti-slavery American Party (better known as Know-Nothings) swept the Massachusetts elections, taking nearly every seat in the legislature.

Much of the debate in the House surrounded Wilson's loyalty to the American Party, or his lack thereof.^[2] Wilson had been the Free Soil Party candidate for governor in 1854 but aligned himself with the nativist Know Nothing movement after their sweeping victory, in an effort to strengthen the party's emphasis on opposition to slavery. (The Free Soil Party had been dissolved into the new Republican Party.)

On January 23, the House convened and elected Wilson on the first ballot. His candidacy was then sent to the Senate for ratification.

On January 31, the State Senate convened and ratified the House's choice of Wilson.

Wilson joined Samuel Hoar's new anti-slavery Republican Party upon entering the Senate.