Datasets:
| State Passed Referendum Vote | |
| S. Carolina December 20, 1860.[1] | |
| Mississippi January 9, 1861.[2] | |
| Florida January 10, 1861.[3] | |
| Alabama January 11, 1861.[4] | |
| Georgia January 19, 1861.[5] | |
| Louisiana January 26, 1861.[6] | |
| Texas February 1, 1861.[7] February 23 46,153-14,747 | |
| Virginia April 17, 1861.[8] May 23 132,201-37,451 | |
| Arkansas May 6, 1861.[9] | |
| Tennessee May 6, 1861.[10] June 8 104,471-47,183 | |
| N. Carolina May 20, 1861.[11] | |
| Missouri October 31, 1861.[12] | |
| Kentucky November 20, 1861.[13] | |