1798 and 1799 United States Senate elections

The 1798 and 1799 United States Senate elections were held at the middle of President John Adams's administration and had no net change in political control of the Senate.

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

Results summary
Senate Party Division, 6th Congress (1799–1801)


 * Majority Party: Federalist (22)
 * Minority Party: Democratic-Republican (9)
 * Other Parties: 0
 * Total Seats: 31

Before the elections
After the January 19, 1798 election in Delaware.

Race summaries
Except if/when noted, the number following candidates is the whole number vote(s), not a percentage.

Special elections during the 5th Congress
In these special elections, the winner was seated before March 4, 1799; ordered by election date.

Races leading to the 6th Congress
In these regular elections, the winner was seated on March 4, 1799; ordered by state.

All of the elections involved the Class 2 seats.

Special elections during the 6th Congress
In this special election, the winner was seated after March 4, 1799, the beginning of the next Congress.