Armijo High School is named after Jose Francisco Armijo, who held one of the six Mexican land grants of Solano County before California became part of the the United States. These land grants included northern eastern parts of Suisun Valley and Tolenas Valley.

Known as Armijo Union High in 1891, the school opened in the Suisun Grammar School, where Latin, English, history and mathematics were the available courses. The school began with 30 students in a single classroom, in the Crystal Elementary School building. Two years later, the first Armijo High School building was built in Union Avenue. The first graduating class consisted of three students.

In March 1915, the new Armijo, which was a 16,000 square-foot building and is current-day Solano County Hall of Justice, opened. Almost 15 years after being established, a fire in the library caused damage to the school, suffering a loss of more than $200,000 in funds. The school moved into various areas nearby the city, including the Fairfield Firemen’s Club rooms, the Methodist Church, multiple rooms of the Fairfield Grammar School, and the Suisun Community Club.

In 1960, the new Armijo building opened on Washington Street, which is the present location, while the library moved to larger areas in Kentucky Street by the 1970s. In 1972, Fairfield Elementary School was established in what is now the Armijo Annex. The elementary school was later absorbed by the ever-growing high school.

Armijo continued to evolve in the current century. In 2001, the school began the International Baccalaureate (IB) program. The school’s new $4 million library was unveiled in 2011, while the new administration building opened three years later. In 2019, the FSUSD school board voted unanimously to change the mascot from the Indians, a term that was viewed by some as racist toward native people, and began the process of adopting a new mascot: the Armijo Royals.

Information sourced from Armijo Signal