- Mexico: California was originally part of Mexico, and many of its early settlers were Mexican.
- The United States: After the United States won the Mexican-American War in 1848, California became part of the US, and many Americans migrated there in search of gold and land.
- Europe: Many Europeans, including Germans, Irish, and Italians, also settled in California during the 19th century.
- East Asia: Chinese and Japanese immigrants also came to California in large numbers in the 19th and 20th centuries.
- South Asia: Indian immigrants began arriving in California in the early 20th century.
Today, California is home to people from all over the world, and its diversity is one of its greatest strengths.