The Centralist Republic of Mexico (Spanish: República Centralista de México), officially the Mexican Republic (Spanish: República Mexicana) was a unitary political regime established in Mexico on October 23, 1835, after the repeal of the Constitution of 1824. Like Spanish moderados, the Mexican conservatives were inspired by the ideal of a centralized, administrative republic in the Central Republic of 1835— 46. The unitary regime was formally established on December 30, 1836, with the enactment of the seven constitutional laws. The centralist Republic lasted for almost eleven years. On August 22, 1846, acting President José Mariano Salas, issued the decree that restored the Constitution of 1824 and with this, the return to federalism.
The centralized attempt was a chaotic experience that generated a severe political instability, armed uprisings and secessions as rebellion in Zacatecas, the Texas revolution, the separation of Tabasco, the independence of Coahuila, Nuevo León and Tamaulipas that formed the Republic of the Rio Grande and finally the independence of Yucatán.
The Mexican Republic was governed by eleven presidents. None were to finish their term before the Republic's dissolution.
During this period there were two international conflicts; the Pastry War, caused by French citizens' economic claims against the Central Government; and the Mexican-American War, consequence of the annexation of Texas by the United States.