Mexico: Regency: 1863-1864
| Supremo Poder Ejecutivo Provisional de la Nación | |
| 25 Jun 1863 - 11 Jul 1863 | Juan Nepomuceno Almonte |
| 25 Jun 1863 - 11 Jul 1863 | José Mariano de Salas Barbosa |
| 25 Jun 1863 - 11 Jul 1863 | Juan Bautista de Ormaechea, Obispo de Tulancingo [1]
full name: Juan Bautista Pascual José de Ormaechea y Ernaiz |
| Regencia del Imperio [2] | |
| 11 Jul 1863 - 19 May 1864 | Juan Nepomuceno Almonte |
| 11 Jul 1863 - 18 Oct 1863 | Juan Bautista de Ormaechea, Obispo de Tulancingo |
| 11 Jul 1863 - 19 May 1864 | José Mariano de Salas Barbosa |
| 18 Oct 1863 - 17 Nov 1863 | Pelagio Antonio Labastida, Arzobispo de México
full name: José Antonio Pelagio de la Santísima Trinidad de Labastida y Dávalos |
- Pending the taking office by Labastida who was absent from Mexico City and never took office as a member of Supremo Poder Ejecutivo Provisional de la Nación.
- The Regency was constituted in accordance with a decree issued by the Assembly of Notables (Asamblea de Notables) on of 11 Jul 1863, instructing the members of Supremo Poder Ejecutivo Provisional de la Nación to continue in office as Regencia del Imperio Mexicano.