J. Gartrell (D) | style="font-size:80%" | Retired January 23, 1861 | Vacant | Not filled this term |- | | | John W. H. Underwood (D) | style="font-size:80%" | Withdrew January 23, 1861 | Vacant | Not filled this term |- | | | James Jackson (D) | style="font-size:80%" | Retired January 23, 1861 | Vacant | Not filled this term |- | | | Joshua Hill (O) | style="font-size:80%" | Resigned January 23, 1861 | Vacant | Not filled this term |- | | | John J. Jones (D) | style="font-size:80%" | Withdrew January 23, 1861 | Vacant | Not filled this term |- | | | Marcus J. Parrott (R) | style="font-size:80%" | Kansas was admitted to the Union January 29, 1861 | colspan=2 | Seat eliminated |- | | New Seat | style="font-size:80%" | Kansas was admitted to the Union January 29, 1861 | | Martin F. Conway (R) | Seated January 29, 1861 |- | | | Williamson R. W. Cobb (D) | style="font-size:80%" | Withdrew January 30, 1861 | Vacant | Not filled this term |- | | | Miles Taylor (D) | style="font-size:80%" | Withdrew February 5, 1861 | Vacant | Not filled this term |} Committees Lists of committees and their party leaders. Senate Alter and Improve Senate Chamber (Select) Amendments to the Constitution (Select) Audit and Control the Contingent Expenses of the Senate (Chairman: Andrew Johnson) Banks of the District of Columbia (Select) Circulation of Bank Notes in the District of Columbia (Select) Claims (Chairman: Alfred Iverson Jr.) Commerce (Chairman: Clement Claiborne Clay) Comptroller William Medill (Select) Distributing Public Revenue Among the States (Select) District of Columbia (Chairman: Albert G. Brown) Duties of Imports (Select) Finance (Chairman: Robert M. T. Hunter) Foreign Relations (Chairman: James M. Mason) French Spoilations (Select) Harpers Ferry Invasion (Select) Indian Affairs (Chairman: William K. Sebastian) Judiciary (Chairman: James A. Bayard Jr.) Memorial of Houmas Lands Settlers (Select) Military Affairs (Chairman: Jefferson Davis) Naval Affairs (Chairman: Stephen Mallory) Ordnance and War Ships (Select) Pacific Railroad (Select) Patents and the Patent Office (Chairman: William Bigler) Pensions (Chairman: N/A) Post Office and Post Roads (Chairman: N/A) Printing (Chairman: N/A) Public Printing Investigation (Select) Private Land Claims (Chairman: N/A) Public Lands (Chairman: Robert W. Johnson) Retrenchment (Chairman: N/A) Revolutionary Claims (Chairman: N/A) Tariff Regulation (Select) Territories (Chairman: N/A) Thirteen on the Disturbed Condition of the Country (Select) Whole House of Representatives