San Diego , California
San Diego County covers approximately 4,255 square miles - 65 miles from north to south and 86 miles from east to west. San Diego County is the second largest in the state with a population of more than 2.6 million. It is located south of Orange County and north of the Mexican border.
The County draws its name from San Diego de Alcala, a designation credited to Spaniard Don Sebastian Vizcaino who sailed into what is now San Diego Bay on November 12, 1603, and renamed it in honor of his flagship and, it is said, his favorite saint. The site was actually discovered 61 years earlier by Juan Rodriguez Cabrillo who had named it San Miguel.
The County of San Diego was established by the State Legislature on February 18, 1850, as one of the original 27 counties of California.
The county seat is the city of San Diego which is also the second largest city in California. Other major cities in San Diego County are Chula Vista, El Cajon, Encinitas, Escondido, National City, Oceanside, San Marcos, Santee and Vista.