nowrap | Lewis McKenzie (U) | February 16, 1863 |- | | nowrap | John A. Logan (D) | Resigned April 2, 1862, to enter the Union Army. | nowrap | William J. Allen (D) | June 2, 1862 |- | | nowrap | Thomas B. Cooper (D) | Died April 4, 1862. | nowrap | John D. Stiles (D) | June 3, 1862 |- | | nowrap | Goldsmith F. Bailey (R) | Died May 8, 1862. | nowrap | Amasa Walker (R) | December 1, 1862 |- | | nowrap | Charles W. Walton (R) | Resigned May 26, 1862, to become associate justice of the Maine Supreme Judicial Court. | nowrap | Thomas A. D. Fessenden (R) | December 1, 1862 |- | | nowrap | Luther Hanchett (R) | Died November 24, 1862. | nowrap | Walter D. McIndoe (R) | January 26, 1863 |- | | nowrap | William A. Richardson (D) | Resigned January 29, 1863, after being elected to the U.S. Senate. | colspan=2 | Vacant thereafter |} Committees Senate Standing committees of the Senate resolved, Friday, March 8, 1861 Foreign Relations Charles Sumner (R-Massachusetts) (Chairman) Jacob Collamer (R-Vermont) James Rood Doolittle (R-Wisconsin) Ira Harris (R-New York) Stephen A. Douglas (D-Illinois) Trusten Polk (D-Missouri) John C. Breckinridge (D-Kentucky) Finance William P. Fessenden (R-Maine) (Chairman) James F. Simmons (R-Rhode Island) Jacob Collamer (R-Vermont) Benjamin F. Wade (R-Massachusetts) Timothy O. Howe (R-Wisconsin) Robert M. T. Hunter (D-Virginia) James Pearce (D-Maryland) Jesse D. Bright (D-Indiana) Commerce Zachariah Chandler (R-Michigan) (Chairman) Preston King (R-New York) Lot Morrill (R-Maine) Henry Wilson (R-Massachusetts) Thomas L. Clingman (D-North Carolina) Samuel G. Arnold (R-Rhode Island) Willard Saulsbury Jr. (D-North Carolina) Andrew Johnson (D-Tennsessee) Military Affairs and Militia Henry Wilson (R-Massachusetts) (Chairman) Preston King (R-New York) Edward D. Baker (R-Oregon) Henry S. Lane (R-Indiana) James H. Lane (R-Kansas) Henry M. Rice (R-Minnesota) Milton S. Latham (D-California) John Breckinridge (D-Kentucky) Jacob M. Howard (R-Michigan) Naval Affairs John P. Hale (R-New Hampshire) (Chairman) James W. Grimes (R-Iowa) Solomon Foot (R-Vermont) Edgar Cowan (R-New Hampshire) John Renshaw Thomson (R-New Jersey) Anthony Kennedy (U-Maryland) Richard Stockton Field (R-New Jersey) John Sherman (D-Ohio) Judiciary Lyman Trumbull (R-Ohio) (Chairman) Lafayette S. Foster (R-Connecticut) John C. Ten Eyck (R-New Jersey) Jacob M. Howard (R-Michigan) Ira Harris (R-New York) Edgar Cowan (R-Pennsylvania) James A. Bayard Jr. (D-Delaware) Lazarus W. Powell (D-Kentucky) Thomas L. Clingman (D-North Carolina) Post Offices and Post