| session | type | convened | adjourned | President pro Tempore of the Senate |
Speaker of the House of Representatives |
|
| Special | SENATE | 4 March 1857 | 14 March 1857 | Mason; Rusk, Thomas J. (Dem.- Texas) | - - - - | |
| ||||||
| 1st | long | 7 December 1857 | 14 June 1858 | Fitzpatrick, Benjamin (Dem.- Alabama) | Orr, James L. (Dem.- South Carolina) | |
| Special | SENATE | 15 June 1858 | 16 June 1858 | Fitzpatrick | - - - - | |
| ||||||
| 2nd | short | 6 December 1858 | 3 March 1859 | Fitzpatrick | Orr | |
|