Established in 1889, Hillsboro High School it is one of the oldest high schools in the state. Commonly referred to as HilHi, the school boasts a rich tradition of academic excellence, sports, and community involvement. The school serves a diverse student body and offers a wide range of programs, including Advanced Placement courses, vocational training, and various arts initiatives. In its current location since 1970, it has been remodeled and updated several times including major upgrades during the HSD Bond work completed in 2023.

With a strong focus on fostering a supportive environment, HilHi emphasizes personal growth alongside academic achievement. The school features numerous clubs and organizations, promoting leadership and engagement among students. Athletic programs are also a point of pride, with many teams competing successfully in state championships. HilHi's commitment to excellence, community service, and inclusivity continues to shape its legacy, making it a vital part of the Hillsboro community and a nurturing ground for future leaders.