9th U.S. Senate

24 Federalists, 10 Republicans before March 16, 1805

23 Federalists, 11 Republicans after March 16, 1805

Senate Majority Leader: Reginald Farswell

Senate Majority Whip: George Frier

Senate Minority Leader: John Cook

Senate Minorty Whip: John Ramsay

* Boggan died of a stroke on March 16, 1805.

** Gould Resigned on October 8, 1805 to become Governor of Ohio.