San Diego County, CA
San Diego County is a county located in the southwestern corner of the State of California. It is the south-westernmost county in the 48 contiguous United States. The City of San Diego is its county seat and by far the largest city in the county. According to the census of 2010, San Diego County had a population of 3,095,313 people, making it the second most populous county in California, following Los Angeles County and the fifth most-populous county in the United States. San Diego County has 70 miles (110km) of coastline. Most of the county has a mild Mediterranean climate to semiarid climate, though there are mountains that receive frost and snow in the wintertime. There are also 16 naval and military installations of the U.S. Navy, U.S. Marine Corps, and the U.S. Coast Guard in San Diego County. These include the Naval Base San Diego, Marine Corps Base Camp Pendleton, Marine Corps Air Station Miramar, and Naval Air Station North Island. San Diego County defines the metropolitan statistical area of San Diego-Carlsbad-San Marcos and as Greater San Diego. San Diego County is also part of the San DiegoTijuana metropolitan area. This area has about five million people and it is the largest metropolitan area shared between the United States and Mexico.