Greater San Diego Area
San Diego County is a county located in the southwestern corner of the state of California. As of the 2010 census, the population was 3,095,313 making it the second-most populous county in California and the fifth-most populous in the United States. Its county seat is San Diego, the eighth-most populous city in the United States. It is the south-westernmost county in the 48 contiguous United States.
The United States Office of Management and Budget has designated San Diego County as the San Diego-Carlsbad, CA Metropolitan Statistical Area. The United States Census Bureau has ranked the San Diego-Carlsbad, CA Metropolitan Statistical Area as the 17th most populous metropolitan statistical area and the 18th most populous primary statistical area of the United States as of July 1, 2012.