1821 in Mexico

Decades:	1800s; 1810s; 1820s; 1830s; 1840s;
See also:	History of Mexico; List of years in Mexico; Timeline of Mexican history;

Events in the year 1821 in Mexico.

Incumbents

February 24 – Army of the Three Guarantees formed
August 24 – Mexico gains its independence from Spain from ratifying the Treaty of Córdoba.
September 28 – The Declaration of Independence of the Mexican Empire is ratified.
September 29 – Agustín de Iturbide is proclaimed as the President of the Regency.

↑ The Mexican Empire, 1821–23. Encyclopædia Britannica. Retrieved 3 August 2026.{{cite encyclopedia}}: CS1 maint: url-status (link)

1821 in North America
Sovereign states	Antigua and Barbuda Bahamas Barbados Belize Canada Costa Rica Cuba Dominica Dominican Republic El Salvador Grenada Guatemala Haiti Honduras Jamaica Mexico Nicaragua Panama Saint Kitts and Nevis Saint Lucia Saint Vincent and the Grenadines Trinidad and Tobago United States
Dependencies and other territories	Anguilla Aruba Bermuda Bonaire British Virgin Islands Cayman Islands Curaçao Greenland Guadeloupe Martinique Montserrat Puerto Rico Saint Barthélemy Saint Martin Saint Pierre and Miquelon Saba Sint Eustatius Sint Maarten Turks and Caicos Islands United States Virgin Islands