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Mt. Diablo High
PublicHighGrades 9–12
2450 Grant St., Concord, CA 94520 · (925) 682-4030 · Part of Mount Diablo Unified School District
Students
1,397
Students per teacher
20:1
Free or reduced lunch
80%
Setting
Suburb
Grades
9–12
What stands out about Mt. Diablo High
- Math proficiency 12 pts below the state
- Larger classes: 20:1 students per teacher
- Enrollment down 10.8% since 2020
Test scores
EDFacts via Urban Institute Education Data Portal (SY2020-21) · 2020–21Math proficiency22%
State average 33.6%
Reading / language arts47%
State average 48.6%
Location
Directions ↗
2450 Grant St., Concord
Students
Enrollment by grade
Grade 9342
Grade 10366
Grade 11355
Grade 12334
Enrollment over time
1,567’20
1,513’21
1,498’22
1,477’23
1,397’24
Down 10.8% since 2020.
Who goes here
Hispanic 74%Black 8%Asian 8%White 5%Two or more races 4%Native Hawaiian/Pacific Islander 1%
As reported to NCES, share of students with a reported race or ethnicity.
What neighbors say
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Parents talk
Conversations in Town Square that mention Mt. Diablo High.
Other schools in Mount Diablo Unified School District
School facts: U.S. Department of Education (NCES), 2024-2025 school year. Scores: EDFacts via Urban Institute Education Data Portal (SY2020-21). The School Grade is our own summary of state test results. Neighbor ratings are opinions, not an official measure of school quality.