1843 in Mexico

Incumbents

• President:
• * until March 4: Nicolás Bravo
• * March 4 – October 4: Antonio López de Santa Anna
• * starting October 4: Valentín Canalizo

  Governors

• Chiapas:
• Chihuahua:
• Coahuila:
• Durango:
• Guanajuato:
• Jalisco:
• State of Mexico:
• Michoacán:
• Nuevo León:
• Oaxaca:
• Puebla:
• Querétaro:
• San Luis Potosí:
• Sinaloa:
• Sonora:
• Tabasco:
• Tamaulipas:
• Veracruz:
• Yucatán:
• Zacatecas:

  Events

• April 30 – May 16 – Naval Battle of Campeche: Naval Battle between the Mexican Navy versus the Texas Navy and the Yucatán Navy. The battle featured the most advanced warships of its day.
• August 23 – President Antonio López de Santa Anna announced that the annexation of Texas by the United States would be considered an act of war by Mexico.

  Notable births

Notable deaths

• March 21 — Guadalupe Victoria, 1st President of Mexico