The Federal Constitution of the United Mexican States of 1824 was the first constitution of Mexico, enacted on October 4 of 1824, inaugurating the First Mexican Republic.

The First Mexican Republic, known also as the First Federal Republic, existed from 1824 to 1835. It was a federated republic, established by the Constitution of 1824, the first constitution of independent Mexico, and officially designated the United Mexican States. It ended in 1835, when conservatives under Antonio López de Santa Anna transformed it into a unitary state, the Centralist Republic of Mexico.