The 59th United States Congress was a meeting of the legislative branch of the United States federal government, composed of the United States Senate and the United States House of Representatives. It met in Washington, D.C. from March 4, 1905, to March 4, 1907, during the fifth and sixth years of Theodore Roosevelt's presidency. The apportionment of seats in the House of Representatives was based on the 1900 United States census. Both chambers had a Republican majority.

Major events

Major legislation

Party summary

Senate

House of Representatives

Leaders

Senate leadership

Presiding

House leadership

Presiding

Majority (Republican) leadership

Minority (Democratic) leadership

Members

This list is arranged by chamber, then by state. Senators are listed by class, and representatives are listed by district.

Senate

At this time, 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 2 meant their term ended with this Congress, requiring reelection in 1906; Class 3 meant their term began in the last Congress, requiring reelection in 1908; and Class 1 meant their term began in this Congress, requiring reelection in 1910.

Alabama

Arkansas

California

Colorado

Connecticut

Delaware

Florida

Georgia

Idaho

Illinois

Indiana

Iowa

Kansas

Kentucky

Louisiana

Maine

Maryland

Massachusetts

Michigan

Minnesota

Mississippi

Missouri

Montana

Nebraska

Nevada

New Hampshire

New Jersey

New York

North Carolina

North Dakota

Ohio

Oregon

Pennsylvania

Rhode Island

South Carolina

South Dakota

Tennessee

Texas

Utah

Vermont

Virginia

Washington

West Virginia

Wisconsin

Wyoming

[Senators' party membership by state at the opening of the 59th Congress in March 1905.

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House of Representatives

Alabama

Arkansas

California

Colorado

Connecticut

Delaware

Florida

Georgia

Idaho

Illinois

Indiana

Iowa

Kansas

Kentucky

Louisiana

Maine

Maryland

Massachusetts

Michigan

Minnesota

Mississippi

Missouri

Montana

Nebraska

Nevada

New Hampshire

New Jersey

New York

North Carolina

North Dakota

Ohio

Oregon

Pennsylvania

Rhode Island

South Carolina

South Dakota

Tennessee

Texas

Utah

Vermont

Virginia

Washington

West Virginia

Wisconsin

Wyoming

Non-voting members

[[File:59 us house membership.png|thumb|300px|

Changes in membership

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

Senate

House of Representatives

Committees

Senate

House of Representatives

Joint committees

Caucuses

Employees

Legislative branch agency directors

Senate

House of Representatives