The 10th United States Congress was a meeting of the legislative branch of the United States federal government, consisting of the Senate and the House of Representatives. It met in Washington, D.C., from March 4, 1807, to March 4, 1809, during the seventh and eighth years of Thomas Jefferson's presidency. The apportionment of seats in the House of Representatives was based on the 1800 census; both chambers had an overwhelming Democratic-Republican majority.

Major events

Major legislation

Territories organized

Party summary

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.

Senate

House of Representatives

Leadership

Senate

House of Representatives

Members

This list is arranged by chamber, then by state. Senators are listed in order of seniority, and representatives are listed by district.

Senate

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.

Connecticut

Delaware

Georgia

Kentucky

Maryland

Massachusetts

New Hampshire

New Jersey

New York

North Carolina

Ohio

Pennsylvania

Rhode Island

South Carolina

Tennessee

Vermont

Virginia

[Senators' party membership by state at the opening of the 10th Congress in March 1807.

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House of Representatives

The names of members of the House of Representatives are preceded by their district numbers.

Connecticut

All representatives were elected statewide on a general ticket. (7 Federalists)

Delaware

(1 Federalist)

Georgia

(4 Democratic-Republicans)

Kentucky

(6 Democratic-Republicans)

Maryland

The 5th district was a plural district with two representatives. (6-3 Democratic-Republican)

Massachusetts

(11-6 Democratic-Republican)

New Hampshire

All representatives were elected statewide on a general ticket. (5 Democratic-Republicans)

New Jersey

All representatives were elected statewide on a general ticket. (6 Democratic-Republicans)

New York

(15-2 Democratic-Republican)

North Carolina

(11-1 Democratic-Republicans)

Ohio

(1 Democratic-Republican)

Pennsylvania

There were four plural districts, the 1st, 2nd, & 3rd had three representatives each, the 4th had two representatives. (15-3 Democratic-Republican)

Rhode Island

Both representatives were elected statewide on a general ticket. (2 Democratic-Republicans)

South Carolina

(8 Democratic-Republicans)

Tennessee

(3 Democratic-Republicans)

Vermont

(2-2 Democratic-Republican)

Virginia

(21-1 Democratic-Republican)

Non-voting members

(no representation)

Changes in membership

The count below reflects changes from the beginning of the first session of this Congress.

Senate

There were 5 resignations, 2 deaths, and 1 interim appointment. Neither party had a net change.

House of Representatives

Of the voting members, there were 4 resignations, 4 deaths, and 2 vacancies from the beginning of this Congress. Democratic-Republicans had no net change and Federalists picked up 2 seats.

Committees

Lists of committees and their party leaders.

Senate

House of Representatives

Joint committees

Employees

Legislative branch agency directors

Senate

House of Representatives