Mountainside High School

Mountainside High School is a well-populated four-year high school in Beaverton, Oregon, overseen by Beaverton SD 48J. The school enrolls 1,741 students in grades 9 through 12. Compared to the state average of about 630 students per school, that is 176% larger than typical.

Beaverton SD 48J runs 56 schools in total, collectively educating 37,479 students. Mountainside High School is one of those campuses.

Demographically, Mountainside High School shows that 56% of the student body identifies as White. Beyond that, the school records 15% Hispanic, 13% Asian, 11% multiracial, 3% Black.

Looking at school resources, Mountainside High School lists 83 full-time-equivalent teachers, putting the student-to-teacher ratio at about 21.1:1. That figure is higher than the state norm's 19.8:1 average. Roughly 50% of students at Mountainside High School qualify for free or reduced-price lunch, a commonly cited indicator of low-income enrollment.

On a residual basis (actual vs predicted given the student mix), Mountainside High School performs roughly as the BeatsExpectations model predicts for a school with this FRL share. The predicted value is around 43.0%, the actual is 42.2%, a residual of -0.8 points.

Around the school, Washington County reports that median household earnings sit near $107,772, roughly 48% of adults have completed at least a four-year degree, and census figures put the poverty rate at about 5%. Mountainside High School is one of 136 public schools in Washington County (combined enrollment of about 79,469 students).

Scholls Heights Elementary School is the nearest neighboring public school, about 0.5 miles from this campus. Counting just inside five miles, 8 other public schools cluster around Mountainside High School. On composite proficiency, Mountainside High School comes 8th of 9 in the immediate cluster, below the nearby-schools average of 54.6%.

Mountainside High School operates from an outlying location.

Trend over the last 7 years. Over the past 7-year window, the student count grew 92%: 905 students in 2018 compared to 1,741 in 2025. White enrollment moved from 62% to 56% across the same window.

In the discussion threads here, members of the Mountainside High School community share and discuss fundraisers, lost-and-found posts, and report-card season. Anyone with firsthand experience at this school can post or comment.