Summary:
The 94598 high-school list has one school, Northgate High, serving grades 9–12 with 1,546 students in the Mt. Diablo Unified district. With no other listed high schools, families cannot compare schools within the area; the most important finding is that Northgate’s proficiency rates are higher than statewide rates in every comparable subject and grade.
Northgate High is the only school, so there is no local top or bottom school to identify. Its all-grades proficiency is 83% in ELA, 61% in math and 54% in science—34, 23 and 18 percentage points above state rates, respectively. For 11th graders, Northgate is ahead of the state by 26 points in ELA, 29 in math and 16 in science. Other outcomes also compare favorably: graduation is 100%, versus 88% statewide and 94% in the district; dropout is 1%, versus 8% statewide and 4% in the district. Chronic absenteeism is 15%, below the district’s 19% and state’s 18%. The 12th-grade science result is suppressed.
ELA and math proficiency rose substantially from 2024–2025 to 2025–2026: Northgate gained 9 points in ELA and 10 in math, widening its state leads by 9 points in each. Science improved by 1 point, while the state gained 3, narrowing Northgate’s science advantage by 3 points. SchoolDigger awards the school 5 stars and ranks it 164th of 2,137 California schools, at the 92nd percentile; its percentile was 93rd in 2023–2024 and 90th in 2024–2025, so the ranking has not moved steadily in one direction. Context figures include a student–teacher ratio of 23.1 for 2024–2025 and 22% free/reduced lunch eligible in 2024–2025; statewide, all students receive free school meals.
Thank you for your feedback!