| State | Secession date | Admitted in the Confederacy |
| South Carolina | State Convention In Charleston (20 December 1860) | Confederate Convention In Montgomery (4 February 1861) |
| Mississippi | State Convention In Jackson (9 January 1861) | Confederate Convention In Montgomery (4 February 1861) |
| Florida | State Convention In Tallahassee (10 January 1861) | Confederate Convention In Montgomery (4 February 1861) |
| Alabama | State Convention In Montgomery (11 January 1861) | Confederate Convention In Montgomery (4 February 1861) |
| Georgia | State Convention In Milledgeville (19 January 1861) | Confederate Convention In Montgomery (4 February 1861) |
| Louisiana | State Convention In Baton Rouge (26 January 1861) | Confederate Convention In Montgomery (4 February 1861) |
| Texas | State Convention In Austin (1 February 1861) Voter Referendum (23 February 1861) Declared In Effect (2 March 1861) | Provisional Confederate Congress (Session I) (2 March 1861) |
