61st United States Congress
Senate
Table:
State
(class)

Vacator

Reason for vacancy

Subsequent

Date of successor's installation

Illinois
(3)

Vacant

Sen. was elected at beginning of term. Served in House until resigning June 18, 1909

William Lorimer (R)

June 18, 1909

Pennsylvania
(1)

Philander C. Knox (R)

Resigned March 4, 1909, after being appointed United States Secretary of State. Successor was elected.

George T. Oliver (R)

March 17, 1909

North Dakota
(3)

Martin N. Johnson (R)

Died October 21, 1909. Successor was appointed.

Fountain L. Thompson (D)

October 10, 1909

Mississippi
(2)

Anselm J. McLaurin (D)

Died December 22, 1909. Successor was appointed.

James Gordon (D)

December 27, 1909

North Dakota
(3)

Fountain L. Thompson (D)

Resigned January 31, 1910. Successor was appointed.

William E. Purcell (D)

February 1, 1910

Mississippi
(2)

James Gordon (D)

Successor was elected.

LeRoy Percy (D)

February 23, 1910

Louisiana
(3)

Samuel D. McEnery (D)

Died June 28, 1910. Successor was appointed and subsequently elected.

John Thornton (D)

December 10, 1910

Virginia
(1)

John W. Daniel (D)

Died June 29, 1910. Successor was appointed.

Claude A. Swanson (D)

August 1, 1910

Iowa
(2)

Jonathan P. Dolliver (R)

Died October 15, 1910

Lafayette Young (R)

November 12, 1910

Georgia
(3)

Alexander S. Clay (D)

Died November 13, 1910. Successor was appointed.

Joseph M. Terrell (D)

November 17, 1910

West Virginia
(2)

Stephen B. Elkins (R)

Died January 4, 1911. Successor was appointed.

Davis Elkins (R)

January 9, 1911

Colorado
(3)

Charles J. Hughes Jr. (D)

Died January 11, 1911.

Vacant until next Congress

West Virginia
(2)

Davis Elkins (R)

Successor was elected.

Clarence W. Watson (D)

February 1, 1911

North Dakota
(3)

William E. Purcell (D)

Successor was elected.

Asle Gronna (R)

February 2, 1911

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