San Jose, California are eight sister cities: San Jose, California San Jose (; Spanish for 'Saint Joseph'; ), officially the City of San José, is an economic, cultural and political center of Silicon Valley, and the largest city in Northern California (both in population and area). With an estimated 2017 population of 1,035,317, it is the third-most populous city in California (after Los Angeles and San Diego) and the tenth-most populous in United States. Located in the center of the Santa Clara Valley, on the southern shore of San Francisco Bay, San Jose covers an area of . San Jose is the county
Almaden Valley, San Jose Almaden Valley, San Jose Almaden Valley, or simply Almaden is a valley and primarily upper middle class residential neighborhood of San Jose, California, in South San Jose. It is named after the New Almaden Quicksilver Mines, which were named after the mercury mine in (old) Almadén, Spain, and produced mercury that was used to process ore during the Gold Rush. Like its Spanish namesake, California's Almaden had a number of quicksilver mines. The mercury was used during gold extraction in the California Gold Rush, but the mines were closed in 1975 and have been converted into Almaden Quicksilver County Park.