United States Senate elections, 1806 and 1807

Dates vary by state

11 of the 34 seats in the United States Senate (plus special elections)
18 seats needed for a majority

	Majority party	Minority party

Party	Democratic-Republican	Federalist
Last election	27 seats	7 seats
Seats before	27	7
Seats won	10	1
Seats after	28	6
Seat change	1	1
Seats up	9	2

Majority party before election

Democratic-Republican

Elected Majority party

Democratic-Republican

The United States Senate elections of 1806 and 1807 were elections that had the Democratic-Republican Party increase its overwhelming control of the Senate by one additional Senator. The Federalists went into the elections with such a small share of Senate seats (7 out of 34, or 21%) that even if they had won every election, they would have still remained a minority caucus. As it was, however, they lost one of the two seats they were defending and picked up no gains from their opponents.

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

Senate Party Division, 10th Congress (1807–1809)

In these special elections, the winner was seated during 1806 or before March 4, 1807; ordered by election date.

In these general elections, the winner was seated on March 4, 1807; ordered by state.

All the elections involved the Class 3 seats.

In this special election, the winner was seated in 1807 after March 4; ordered by election date.

...
Wikipedia