Hillsboro High School is a public high school in Hillsboro, Oregon, United States, and is the oldest high school in the Hillsboro School District. It is also the smallest high school in the district.

The Hillsboro School District 1J is a unified school district located in Hillsboro, Oregon, United States. The district operates 26 elementary schools, four middle schools, and four high schools. Founded in 1851, the school district covers Hillsboro, Scholls, Reedville, North Plains, West Union, and other area communities. Total enrollment as of the 2019–2020 school year is 20,269 students, the fourth largest in the state.