Founded in 1909, Montebello High School is a public high school which is part of the Montebello Unified School District, and has an enrollment of approximately 2,600^[3] students in grades 9-12. Its campus is located in Montebello, California, a suburb of Los Angeles. It is named for the city of Montebello.

The Montebello High School mascot is known as Ollie the Oiler, and the school's students and alumni are referred to as Oilers, (a reference to when Montebello was an oil-drilling town during the 1920s and 1930s).

The demographic breakdown of the 3,191 students enrolled for the 2012-2013 school year was:

• Male - 50.7%
• Female - 49.3%
• Native American/Alaskan - 0.1%
• Asian/Pacific islander - 0.9%
• Black - 0.3%
• Hispanic - 96.1%
• White - 2.4%
• Multiracial - 0.2%

Additionally, 86.3% of the students were eligible for free or reduced lunch.^[2]

The school currently offers 2 Pathways. The first of the two is the CATS Pathway, which teaches students how to be creative media artists and animators. The second of the two is the DRIVEN Pathway, which focuses on students learning about ergo alternative fuels and the automotive industry for future green jobs. For the other stuff, there is also AVID. AVID, which focuses to close the opportunity gap by preparing all students for college readiness and success in a global society.