The Californias (region)

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For the Spanish colonial province of the same area, see The Californias.

The Californias is a geographic region of North America, in the Western United States and Northwestern Mexico.


The Californias region comprises the U.S. state of California, and the two Mexican states on the Baja California Peninsula: Baja California; and Baja California Sur.


From 1768 to 1804 this region was the Spanish colonial Provéncia de Las Californias (The Californias Province) in the northwestern territory of the Viceroyalty of New Spain (colonial México).

In 1804 the upper section was established as the separate Alta California territory, first within Viceroyalty of New Spain (1804-1822), and then as a territory in independent Mexico (1822-1846).


The three states have a combined population of 42,368,704. The five largest cities are Los Angeles, followed by San Diego, Tijuana, San Jose, San Francisco, and Mexicali.

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