Cupertino ( KOOP-ər-TEEN-oh) is a city in Santa Clara County, California, United States, directly west of San Jose on the western edge of the Santa Clara Valley with portions extending into the foothills of the Santa Cruz Mountains. The population was 60,381 as of the 2020 census, decreasing by 1,671 (-2.9%) to a Census-estimated 58,710 by 2024....