The 18th 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, 1823, to March 4, 1825, during the seventh and eighth years of James Monroe's presidency. The apportionment of seats in the House of Representatives was based on the 1820 United States census. Both chambers had a Democratic-Republican majority.

Major events

! | States for Adams ! | States for Jackson ! | States for Crawford

Major legislation

Party summary

The count below identifies party affiliations at the beginning of the first session of this Congress, and includes members from vacancies and newly admitted states, when they were first seated. Changes resulting from subsequent replacements are shown below in the "Changes in membership" section. The 18th Congress was the final one in which members sat who are identified with the First Party System and the Federalist Party.

Senate

House of Representatives

Leadership

Senate

House of Representatives

Members

This list is arranged by chamber, then by state. Senators are listed by class, 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. In this Congress, Class 1 meant their term began in the last Congress, requiring re-election in 1826; Class 2 meant their term began with this Congress, requiring re-election in 1828; and Class 3 meant their term ended with this Congress, requiring re-election in 1824.

Alabama

Connecticut

Delaware

Georgia

Illinois

Indiana

Kentucky

Louisiana

Maine

Maryland

Massachusetts

Mississippi

Missouri

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 18th Congress in March 1823. Delaware's senators were not seated until January 1824.

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House of Representatives

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

Alabama

Connecticut

All representatives were elected statewide on a general ticket.

Delaware

Georgia

All representatives were elected statewide on a general ticket.

Illinois

Indiana

Kentucky

Louisiana

Maine

Maryland

The 5th district was a plural district with two representatives.

Massachusetts

Mississippi

Missouri

New Hampshire

All representatives were elected statewide on a general ticket.

New Jersey

All representatives were elected statewide on a general ticket.

New York

There were three plural districts: the 20th & 26th had two representatives each, the 3rd had three representatives.

North Carolina

Ohio

Pennsylvania

There were six plural districts: the 7th, 8th, 11th, and 16th had two representatives each, the 4th and 9th had three representatives each.

Rhode Island

All representatives were elected statewide on a general ticket.

South Carolina

Tennessee

Vermont

All representatives were elected statewide on a general ticket.

Virginia

Non-voting members

Changes in membership

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

Senate

House of Representatives

Committees

Lists of committees and their party leaders.

Senate

House of Representatives

Joint committees

Employees

Legislative branch agency directors

Senate

House of Representatives