Vacaville High School is an American public high school in the Vacaville Unified School District located in the city of Vacaville, California, serving the north side of the city and the far northern unincorporated communities of Allendale, Bucktown and Hartley.

[4] The original school building was completed in 1898[5] and was used until 1952, when a new building replaced it.

Originally named Vacaville Union High School.

[5] In 2018, two fifteen-classroom mathematics and English buildings were opened.

[6][7]