Almaden Valley (often called just Almaden) is an affluent upper-middle-class neighborhood of about 37,000 in the southeastern portion of San Jose, California, USA, roughly equivalent to the 95120 ZIP Code. The neighborhood is south east of the town of Los Gatos, west of the Santa Teresa neighborhood of San Jose and south of Coleman Rd. at the southern end of the Blossom Hill neighborhood of 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. The informal borders are generally Coleman Rd. at the northern end, McKean Rd. at the southern end, where the valley becomes mostly rural, and the town of Los Gatos to the west. The valley is located between the Santa Teresa Hills and the Santa Cruz Mountains, with Mount Umunhum to the west dominating the local geography. 

As part of the Silicon Valley, the main industry in the neighborhood is now high technology research and development; IBM Almaden Research Center is located there. The neighborhoods consist of primarily upper-middle-class families, with homes owned by local professionals, scientists, athletes, and Silicon Valley executives. According to a 2011 estimate, the median income for a household in Almaden was $148,801 and the median income for a family was $182,981. The cost of a home in the neighborhood is generally in the $1 million-plus range.