Campbell is a city in Santa Clara County, California, in the San Francisco Bay Area. As of the 2020 U.S. Census, Campbell's population is 43,959. Campbell is home to the Pruneyard Shopping Center, a sprawling open-air retail complex which was involved in a famous U.S. Supreme Court case that established the extent of the right to free speech in California. Today, the Pruneyard Shopping Center is home to the South Bay offices of the Federal Bureau of Investigation.