Campbell High School was the first high school to open in the Campbell Union High School District. The school was established on September 14, 1900, in Campbell, California. It is also sometimes called Campbell Union High School, and the abbreviation can be found both as CHS or CUHS.

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.