Basic Information About California

California is the most populous state in the United States and one of the most economically and culturally influential places anywhere in the world. It is known for global cities, Pacific coastline, agriculture, technology, entertainment, mountains, deserts, and an unmatched variety of landscapes and regional identities.

Capital: Sacramento
Largest city: Los Angeles
Nickname: The Golden State
Statehood: September 9, 1850 (31st state)
Region: West
Motto: Eureka

California stretches from the Pacific Northwest boundary down to Mexico and from the coast all the way across major mountain and desert systems. That geographic span is one of the main reasons it feels less like a single state and more like several large regions operating together.

The biggest population centers include Los Angeles, the San Francisco Bay Area, San Diego, Sacramento, and the wider Southern California and Central Valley corridors. The state's internal regional differences matter enormously. Northern and Southern California are not interchangeable, and coastal California differs sharply from inland California.

With roughly 39 million residents, California is the most populous state by a wide margin, and its economy alone would rank among the five largest in the world if the state were an independent country — a scale that gives California's policy decisions, from emissions standards to labor law, outsized influence well beyond its own borders.

California is nationally important in technology, entertainment, agriculture, manufacturing, trade, higher education, and immigration history. It also plays an outsized role in environmental policy, housing debates, water management, and transportation questions.

If there is one useful way to summarize California early, it is this: scale and variety define it. The state is too large and too diverse to reduce to a single climate, city, industry, or cultural image. That complexity is exactly why California remains so central to the broader American story.