| Election Name: | 1863 United States Senate election in Massachusetts |
| Type: | presidential |
| Ongoing: | no |
| Previous Election: | 1857 United States Senate election in Massachusetts |
| Previous Year: | 1857 |
| Next Election: | 1869 United States Senate election in Massachusetts |
| Next Year: | 1869 |
| Election Date: | January 15, 1863 |
| Votes For Election: | 40 Members of the Massachusetts Senate 235 Members of the Massachusetts House Majority vote of each house needed to win |
| 1Blank: | Senate |
| 2Blank: | Percentage |
| 3Blank: | House |
| 4Blank: | Percentage |
| Image1: | Charles Sumner - Brady-Handy.jpg |
| Nominee1: | Charles Sumner |
| Party1: | Republican Party (United States) |
| 1Data1: | 33 |
| 2Data1: | 82.5% |
| 3Data1: | 194 |
| 4Data1: | 82.55% |
| Nominee2: | Josiah Abbott |
| Party2: | Democratic Party (United States) |
| 1Data2: | 5 |
| 2Data2: | 12.5% |
| 3Data2: | 38 |
| 4Data2: | 16.17% |
| Senator | |
| Before Election: | Charles Sumner |
| Before Party: | Republican Party (United States) |
| After Election: | Charles Sumner |
| After Party: | Republican Party (United States) |
The 1863 United States Senate election in Massachusetts was held on January 9, 1863. Incumbent Charles Sumner was re-elected to a third term in office.
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 the 1862 state legislative elections, supporters of the Lincoln administration who nonetheless opposed the emancipation of Southern slaves and Senator Sumner's re-election organized a "People's Convention," hoping to consolidate opposition and gain enough seats in the legislature to deny Sumner election. However, the legislature remained largely Republican, ensuring Sumner's victory in the January election.[1]
The lone vote for Adams was cast by Senator Whitney of Hampden. Senator Crane of Worcester County did not vote.