San Diego is a city located on the Pacific coast of Southern California, situated adjacent to the Mexico–United States border. It serves as the county seat of San Diego County and stands as the eighth-most populous city in the United States. With a population exceeding 1.4 million people, it is the second-most populous city in the state of California.
The city is characterized by its mild Mediterranean climate and extensive network of beaches and parks. Historically, San Diego has maintained a long association with the United States Navy. In recent years, the region has also emerged as a significant development center for biotechnology, healthcare, electronics, and wireless technologies.