San Diego is an American city. Located in San Diego County, California; on the coast of the Pacific Ocean in Southern California, approximately 190 kilometers south of Los Angeles and immediately adjacent to the border with Mexico. With an estimated population of 1,394,928 as of July 1, 2015.1 San Diego is the eighth largest city in the United States and the second largest in California. It is part of the San Diego-Tijuana conurbation, the second largest urban agglomeration between the United States and a border country, after Detroit-Windsor, with a population of 4,922,723 inhabitants. San Diego has been called «the birthplace of California.» It is known for its stable and warm climate throughout the year, natural deep-water harbors, long beaches, long cooperation with the United States Navy, and recent growth in the health and biotechnology industry.