1812 and 1813 United States Senate elections

The 1812 and 1813 United States Senate elections were elections that, coinciding with President James Madison's re-election, had the Democratic-Republican Party lose two seats but still retain an overwhelming majority in the United States Senate. As in recent elections, the minority Federalists had gone into the elections with such a small share of Senate seats (6 out of 36, or 16.7%) that if they had won every one of the elections, they would still not have controlled a majority.

As these elections were prior to ratification of the seventeenth amendment, Senators were chosen by state legislatures.

Before the elections
Composition after September 1812 elections in the new state of Louisiana.

Special elections during the 12th Congress
In these special elections, the winners were seated during 1812 or before March 4, 1813; ordered by election date.

Races leading to the 13th Congress
In these regular elections, the winner was seated on March 4, 1813 (except where noted due to late election); ordered by state.

All of the elections involved the Class 3 seats.

Special elections during the 13th Congress
In these special elections, the winners were seated in 1813 after March 4; ordered by election date.