San Diego is a city on the Pacific coast of Southern California, next to the Mexican border. It is the eighth-most populous city in the U.S. and second-most populous city in California with a population of over 1.4 million, while the San Diego area with over 3.3 million residents is the 18th-largest metropolitan area in the country. San Diego is the county seat of San Diego County. It is known for its mild Mediterranean climate, extensive beaches and parks, long association with the United States Navy, and recent emergence as a wireless, electronics, healthcare, and biotechnology development center. Historically home to the Kumeyaay people, San Diego has been referred to as the Birthplace of California, as it was the first site visited and settled by Europeans on what is now the West Coast of the United States. In 1542, Juan Rodríguez Cabrillo claimed the area for Spain, forming the basis for the settlement of Alta California, 200 years later.

Country: United States
State: California
County: San Diego
Established: July 16, 1769
Incorporated: March 27, 1850
Named for: Saint Didacus of Alcalá
• Type: Mayor-council
• Body: San Diego City Council
• Mayor: Todd Gloria (D)
• City Attorney: Heather Ferbert (D)
• Water: 12.50%
• Total: 1,386,932
• Estimate (2025): 1,406,106
• Rank: 20th in North America, 8th in the United States, 2nd in California
• Urban: 3,070,300 (US: 15th)
• Metro: 3,298,799 (US: 18th)
Demonym(s): San Diegan
ZIP Codes: 92101–92124, 92126–92132, 92134–92140, 92142–92143, 92145, 92147, 92149–92150, 92152–92155, 92158–92161, 92163, 92165–92179, 92182, 92186–92187, 92191–92193, 92195–92199
Area codes: 619/858
Website: [sandiego.gov]
Official Website: https://www.sandiego.gov/
Wikidata description: seat of San Diego County, California, United States; second-largest city in California
Wikidata id: Q16552
Wikidata label: San Diego
Wikidata aliases: Array
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