Territorial evolution of California

Updated on Nov 21, 2023

Edit

Comment

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

Timeline

Historical territorial claims of Spain in the present State of California:

Las Californias, 1768–1804

Gran Cuenca (Great Basin), 1776–1821

Alta California, 1804–1821

Adams-Onis Treaty of 1819

Treaty of Córdoba of 1821

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

Alta California, 1821–1848

Gran Cuenca (Great Basin), 1821–1848

Mexican-American War, 1846–1848

California Republic, 1846

U.S. military government of California, 1846–1849

Treaty of Guadalupe Hidalgo of 1848

Historical political divisions of the United States in the present State of California:

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

Compromise of 1850

State of Deseret (extralegal), 1849–1850

Provisional government of California, 1849–1850

State of California since 1850

California Statehood Act, September 9, 1850

(Text) CC BY-SA