The 89th 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 January 3, 1965, to January 3, 1967, during the second and third years of Lyndon B. Johnson's presidency. The apportionment of seats in the House of Representatives was based on the 1960 United States census. Both chambers had a Democratic supermajority, and with the election of President Lyndon B. Johnson to his own term in office, maintaining an overall federal government trifecta. This is the last time Democrats or any party had a 2/3rd supermajority in the Senate. The 89th Congress is regarded as "arguably the most productive in American history". Some of its landmark legislation includes Social Security Amendments of 1965 (the creation of Medicare and Medicaid), the Voting Rights Act, Higher Education Act, Immigration and Nationality Act of 1965, Elementary and Secondary Education Act and the Freedom of Information Act.

Major events

Major legislation

Constitutional amendments

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.

Senate

House of Representatives

[[File:89 us house membership.png|thumb|400px|

Leadership

Senate

Majority (Democratic) leadership

Minority (Republican) leadership

House of Representatives

Majority (Democratic) leadership

Minority (Republican) leadership

Caucuses

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 are popularly elected statewide 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 this Congress, requiring reelection in 1970; Class 2 meant their term ended with this Congress, requiring reelection in 1966; and Class 3 meant their term began in the last Congress, requiring reelection in 1968.

Alabama

Alaska

Arizona

Arkansas

California

Colorado

Connecticut

Delaware

Florida

Georgia

Hawaii

Idaho

Illinois

Indiana

Iowa

Kansas

Kentucky

Louisiana

Maine

Maryland

Massachusetts

Michigan

Minnesota

Mississippi

Missouri

Montana

Nebraska

Nevada

New Hampshire

New Jersey

New Mexico

New York

North Carolina

North Dakota

Ohio

Oklahoma

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 89th Congress in January 1965

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House of Representatives

Names of members are preceded by their district numbers.

Alabama

Alaska

Arizona

Arkansas

California

Colorado

Connecticut

Delaware

Florida

Georgia

Hawaii

Idaho

Illinois

Indiana

Iowa

Kansas

Kentucky

Louisiana

Maine

Maryland

Massachusetts

Michigan

Minnesota

Mississippi

Missouri

Montana

Nebraska

Nevada

New Hampshire

New Jersey

New Mexico

New York

North Carolina

North Dakota

Ohio

Oklahoma

Oregon

Pennsylvania

Rhode Island

South Carolina

South Dakota

Tennessee

Texas

Utah

Vermont

Virginia

Washington

West Virginia

Wisconsin

Wyoming

Non-voting member

Changes in membership

Senate

House of Representatives

Committees

Senate

House of Representatives

Joint committees

Employees

Legislative branch agency directors

Senate

House of Representatives

Footnotes