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Today in History: San Diego becomes first city in California

3/27/2026

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Summary

Story summary

On March 27, 1850, San Diego became the first European settlement in present-day California to be incorporated as a city. Located on the Pacific coast, it has since grown into the eighth-most populous city in the U.S., known for its mild climate, beaches, and significant ties to the U.S. Navy and technology sectors.

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Story summary

On March 27, 1850, San Diego became the first European settlement in present-day California to be incorporated as a city. Located on the Pacific coast, it has since grown into the eighth-most populous city in the U.S., known for its mild climate, beaches, and significant ties to the U.S. Navy and technology sectors.