San Diego, named after Saint Didacus (Spanish: Diego de Alcalá), is the eighth largest city in the United States and second-largest city in California, after Los Angeles, with a population of 1,359,132 (Jan 2010) within its administrative limits on a land area of 372.1 square miles (963.7 km2). The urban area of San Diego extends beyond the administrative city limits with a population of 2,880,000. Also, this is part of megalopolis (San Diego and Los Angeles metropolitan areas) with a population of about 22 million. Located along the Pacific Ocean on the west coast of the United States.

The city is also the county seat of San Diego County[2] as well as the economic center of the San Diego–Carlsbad–San Marcos Metropolitan Area considered congruent with the county. The city was rated the fifth best place to live in 2006 by Money Magazine.[3] According to Forbes magazine, San Diego is the fifth-wealthiest city in the United States.[4] San Diego's top four industries are manufacturing, defense, tourism, and agriculture.[5] San Diego's economy is largely composed of agriculture, biotechnology/biosciences, computer sciences, electronics manufacturing, defense-related manufacturing, financial and business services, ship repair, ship construction, software development, telecommunications, wireless research, and tourism. The presence of the University of California, San Diego (UCSD) with the affiliated UCSD Medical Center promotes research in biotechnology.