On January 31, 1955, Edith S. Green, Oregon, was appointed to the Committee.

On February 26, 1958, Lee W. Metcalf, Montana, resigned from the Committee.

On February 26, 1958, LeRoy H. Anderson, Montana, was appointed to the Committee.

Leo W. O'Brien, New York
Walter E. Rogers, Texas
Gracie B. Pfost, Idaho
James A. Haley, Florida

Eighty-Sixth Congress
(1959-1961)

Majority: Democrat
Minority: Republican

Wayne N. Aspinall, Colorado

Adam C. Powell, Jr., New York
Edmond A. Edmondson, Oklahoma
George H. Christopher, Missouri
Bernice F. Sisk, Missouri
Stewart L. Udall, Arizona
J.T. Rutherford, Texas
Walter S. Baring, Jr., Nevada
Albert C. Ullman, Oregon
LeRoy H. Anderson, Montana
Dalip S. Saund, California
Donald F. McGinley, Nebraska
Thomas G. Morris, New Mexico
Ralph J. Rivers, Alaska

Quentin N. Burdick, North Dakota

Antonio Fernos-Isern, Comm. of Puerto Rico

John A. Burns, Hawaii Territory

John P. Saylor, Pennsylvania
J. Earnest Wharton, New York
Ellis Y. Berry, South Dakota
Alfred John Westland, Washington
Craig Hosmer, California

J. Edgar Chenoweth, Colorado
Harold R. Collier, Illinois
Gardener R. Withrow, Wisconsin
Robert C. Wilson, California
Glenn C. Cunningham, Nebraska
Odin E. S. Langen, Minnesota
Edna Oakes Simpson, Illinois

On January 23, 1959, George H. Christopher, Missouri,died in office.

On March 11, 1959, William J. Randall, Missouri, was appointed to the Committee.

On August 21, 1959, John A. Burns, Hawaii Territory, resigned from the House when Hawaii attained Statehood.

On January 18, 1960, Harold R. Collier, Illinois, resigned from the Committee.

On Janaury 18, 1960, John H. Kyl, Iowa, was appointed to the Committee to replace Harols R. Collier.

On August 8, 1960, Quinten N. Burdick, North Dakota, resigned from the Committee.

On August 23, 1960, Roy A. Taylor, North Carolina, was appointed to the Committee to fill the vacancy of Quinten N. Burdick.

Eighty-Seventh Congress
(1961-1963)

Majority: Democrat
Minority: Republican

Wayne N. Aspinall, Colorado

On January 18, 1962, Morris K. Udall, Arizona, was appointed to the Committee.

On January 30, 1962, John M. Ashbrook, Ohio, was appointed to the Committee.

Eighty-Eighth Congress
(1963-1965)

Majority: Democrat
Minority: Republican

Wayne N. Aspinall, Colorado

On July 18, 1963, Hjalmar C. Nygaard, North Dakota, died in office.

On October 30, 1963, Mark Andrews, North Dakota was appointed to the Committee.
On February 25, 1964 Herbert Ray Roberts, Texas, resigned from the Committee.
On February 25, 1964, Phillip Burton, California was appointed to the Committee.