Territorial evolution of New Mexico

Updated on Sep 19, 2024

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The following timeline traces the territorial evolution of the U.S. State of New Mexico.

Timeline

Historical territorial claims of Spain in the present State of New Mexico:

Nueva Vizcaya, 1562-1821

Santa Fé de Nuevo Méjico, 1598-1821

Treaty of Córdoba of 1821

Historical territorial claims of France in the present State of New Mexico:

Louisiane, 1682–1764

Treaty of Fontainebleau of 1762

Historical territorial claims of Spain in the present State of New Mexico:

Luisiana, 1764-1803

Third Treaty of San Ildefonso of 1800

Historical territorial claims of France in the present State of New Mexico:

Louisiane, 1803

Vente de la Louisiane of 1803

Historical territorial claims of Mexico in the present State of New Mexico:

Santa Fé de Nuevo México, 1821-1848

Treaty of Guadalupe Hidalgo of 1848

Historical territorial claims of the Republic of Texas in the present State of New Mexico:

Disputed territory east of the Rio Grande, 1836-1845

Texas Annexation of 1845

Historical political divisions of the United States in the present State of New Mexico:

Unorganized territory created by the Louisiana Purchase, 1803-1804

District of Louisiana, 1804-1805

Territory of Louisiana, 1805-1812

Territory of Missouri, 1812-1821

Territory of Arkansaw, 1819-1836

Adams-Onís Treaty of 1819

Disputed territory created by the Texas Annexation, 1845-1850

Compromise of 1850

Mexican-American War, 1846-1848

U.S. Military Province of New Mexico, 1846

U.S. Provisional Government of New Mexico 1846-1850

Unorganized territory created by the Treaty of Guadalupe Hidalgo, 1848-1850

State of Deseret (extralegal), 1849-1850

Proposed state of New Mexico, 1850

Territory of New Mexico, 1850-1912

Gadsden Purchase of 1853

American Civil War, 1861-1865

Arizona Territory (CSA), 1861-1865

State of New Mexico since 1912

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