what county is san diego, ca in
San Diego (/ËsÃ¦n diËËeÉªÉ¡oÊ/, Spanish for Saint Didacus; Spanish: [san ËÃ°je.É£o]) is a major city in California, United States. It is in San Diego County, on the coast of the Pacific Ocean in Southern California, approximately 120 miles (190 km) south of Los Angeles and immediately adjacent to the border with Mexico.