The 11th United States Congress was a meeting of the legislative branch of the United States federal government, consisting of the United States Senate and the United States House of Representatives. It met in Washington, D.C. from March 4, 1809, to March 4, 1811, during the first two years of James Madison's presidency. The apportionment of seats in the House of Representatives was based on the 1800 United States census. Both chambers had a Democratic-Republican majority.
The count below identifies party affiliations at the beginning of the first session of this congress. Changes resulting from subsequent replacements are shown below in the "Changes in membership" section.
This list is arranged by chamber, then by state. Senators are listed by class, and representatives are listed by district.
Senators were elected by the state legislatures every two years, with one-third beginning new six-year terms with each Congress. Preceding the names in the list below are Senate class numbers, which indicate the cycle of their election. In this Congress, Class 1 meant their term began with this Congress, requiring re-election in 1814; Class 2 meant their term ended with this Congress, requiring re-election in 1810; and Class 3 meant their term began in the last Congress, requiring re-election in 1812.
The names of members of the House of Representatives are preceded by their districts.
The count below reflects changes from the beginning of the first session of this Congress.
There were 8 resignations, 2 deaths, 1 interim appointment, and 1 vacancy from before this Congress.
Of the voting members, there were 12 resignations, 1 death, and 1 change due to a contested election.
Lists of committees and their party leaders.