When did the Federal Republic of Mexico exist?

The Federal Republic of Mexico existed 1824–1835/1864. On this map it is drawn 1824–1865.

How large was the Federal Republic of Mexico?

At its greatest extent drawn on this map, the Federal Republic of Mexico covered about 3.2 million km². That is the largest area the border data gives it across the years it is drawn, not necessarily its greatest extent in history.

North America · Independence and the new republics

Federal Republic of Mexico

1824–1835/1864

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Existed: 1824–1835/1864
Shown on the map: 1824–1865
Peak area: 3.2M km²
Region: North America

Overview

The First Mexican Republic was established by the Constitution of 1824, which — modeled partly on the U.S. Constitution — created a federal republic of sovereign states with a president, a bicameral Congress, and Catholicism as the state religion. Its first president was Guadalupe Victoria (1824–1829), the only early president to complete his term amid the chronic instability that followed. The capital was Mexico City, and the republic inherited a huge territory from the defunct empire, including the sparsely settled far north (Texas, New Mexico, Alta California).

History

The federal republic was destabilized by the fierce, defining conflict between Federalists (favoring state autonomy, generally liberal) and Centralists (favoring a strong central government, generally conservative), compounded by a bankrupt treasury and the recurring intervention of the army — above all the mercurial Antonio López de Santa Anna, who dominated Mexican politics for decades. In 1835, Santa Anna and the Centralists abolished the federal system, replacing it with the centralized Siete Leyes (1836) — a change that provoked the secession of Texas (entry 15) and other revolts.

Decline and legacy

Mexico's early republican decades were catastrophic territorially: it lost Texas (1836), then roughly half its national territory to the United States in the Mexican–American War (1846–1848) under the Treaty of Guadalupe Hidalgo. After the liberal Reform (La Reforma) under Benito Juárez and the Reform War (1857–1861), conservatives invited French intervention, producing the Second Mexican Empire under Maximilian (1864–1867) — the point at which the source table closes this "1824–1865" entry. The republican tradition established in 1824 nonetheless became the enduring template for the modern Mexican state.

Common questions

What was the Federal Republic of Mexico?: The First Mexican Republic was established by the Constitution of 1824, which — modeled partly on the U.S. Constitution — created a federal republic of sovereign states with a president, a bicameral Congress, and Catholicism as the state religion.
When did the Federal Republic of Mexico exist?: The Federal Republic of Mexico existed 1824–1835/1864. On this map it is drawn 1824–1865.
How large was the Federal Republic of Mexico?: At its greatest extent drawn on this map, the Federal Republic of Mexico covered about 3.2 million km². That is the largest area the border data gives it across the years it is drawn, not necessarily its greatest extent in history.
Who ruled the Federal Republic of Mexico?: The federal republic was destabilized by the fierce, defining conflict between Federalists (favoring state autonomy, generally liberal) and Centralists (favoring a strong central government, generally conservative), compounded by a bankrupt treasury and the recurring intervention of the army — above all the mercurial Antonio López de Santa Anna, who dominated Mexican politics for decades.
How did the Federal Republic of Mexico end?: Mexico's early republican decades were catastrophic territorially: it lost Texas (1836), then roughly half its national territory to the United States in the Mexican–American War (1846–1848) under the Treaty of Guadalupe Hidalgo.

Sources

This compendium cites its sources once for the whole document rather than per territory, and states that it was written from established reference works with targeted checks on current facts, rather than from a fresh multi-source research pass. It names the English Wikipedia article for each polity and its key figures as the basis of these profiles, supplemented by Encyclopaedia Britannica, the US National Park Service and the World History Encyclopedia. The article this entry is anchored on:

Wikipedia — Mexico en.wikipedia.org/wiki/Mexico

This entry was last updated 12 September 2026.

This entry was researched and drafted with AI from the sources above, and has not been reviewed by a historian. How entries are made

Text available under CC BY-SA 4.0: reuse it with a credit to The World Through Time and a link to this page. Passages drawing on the Wikipedia articles listed above are also licensed CC BY-SA 4.0 by their contributors.

Border geometry for the map itself comes from Cliopatria v0.12 (Seshat Global History Databank, CC-BY-4.0).

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