New Almaden is an unincorporated community in Santa Clara County, California, United States. New Almaden is 11 miles (18 km) south-southeast of downtown San Jose. New Almaden has a post office with ZIP code 95042, which first opened in 1861. The community is named after the New Almaden mine, which opened in the area in 1848. New Almaden was the childhood home of former Arizona Cardinals All-Pro safety Pat Tillman and also the childhood home of long time professional EquestrianClayton Jackson a noted trainer of Hunters, Jumpers and Equitation horses.