Tranquillity High School (founded in 1917) was formerly known as Tranquillity Union High School (TUHS) until THS and other satellite schools in the area combined and formed the Golden Plains Unified School District in the early 1990s. Prior to the formation of the new district, students from the town of Mendota also attended there. The school serves the communities of Tranquillity, San Joaquin, Helm and Cantua Creek and is fully accredited through 2022.

Notable alumni

* Cruz Bustamante (1971),

Lieutenant Governor of California The lieutenant governor of California is the second highest executive officer of the government of the U.S. state of California. The lieutenant governor is elected to serve a four-year term and can serve a maximum of two terms. In addition to l ...

from 1999 to 2007, serving under Governors

Gray Davis Joseph Graham "Gray" Davis Jr. (born December 26, 1942) is an American attorney and former politician who served as the 37th governor of California from 1999 to 2003. In 2003, only a few months into his second term, Davis was recalled and remov ...

and

Arnold Schwarzenegger Arnold Alois Schwarzenegger (born July 30, 1947) is an Austrian and American actor, film producer, businessman, retired professional bodybuilder and politician who served as the 38th governor of California between 2003 and 2011. ''Time'' ...

. High schools in Fresno County, California Public high schools in California 1917 establishments in California {{California-school-stub