Mt. Diablo High
🇺🇸 Official data · 2025Concord, California 94520 · Mt. Diablo Unified
#1148 of 1,343 high schools in California
#15532 of 16,910 nationally
About Mt. Diablo High
Mt. Diablo High is a public high located in Concord, in the Mt. Diablo Unified school district of California, United States. It caters for Grades 9–12. In 2025 it enrolled 1,397 students. Traditional public schools run by a school district; free to attend.
Its Success Index (US) is 18.5 out of 100, placing it in the lower 50% of high schools in United States and 1148th of 1,343 ranked high schools in California. Its strongest component is reading proficiency (23th percentile), and its weakest is math proficiency (12th percentile).
Other published figures: enrollment 1,397.
There are 22 schools in Concord; Mt. Diablo High ranks 15th of 22 scored schools there.
Success Index (US) breakdown
Each component is a percentile against high schools across United States.
- Math proficiency (30%)15%
- Reading proficiency (30%)36%
- Community advantage (fewer free/reduced-price lunch) (25%)80%
- Students per teacher (15%)20.0
The Success Index (US) summarises published data about a school community. It is not a measure of teaching quality. Read the methodology.
Published measures
All figures published for Mt. Diablo High by the official sources.
- Enrollment
- 1,397
- Students enrolled in the latest NCES directory year.
- Free/reduced-price lunch
- 80%
- Share of students eligible for free or reduced-price lunch.
- Students per teacher
- 20.0
- Enrollment divided by FTE teachers; not class size.
- Reading proficiency
- 36%
- Share of tested students proficient or above (all students, all grades).
- Math proficiency
- 15%
- Share of tested students proficient or above (all students, all grades).
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Schools near Mt. Diablo High
Closest schools by straight-line distance, with their Success Index (US).
Rocketship Futuro Academy
Concord · Charter elementary · Grades K–5
669 students · 1.4 km away
Holbrook Language Academy
Concord · Public elementary · Grades K–8
501 students · 1.4 km away
Wren Avenue Elementary
Concord · Public elementary · Grades K–5
349 students · 1.8 km away
Meadow Homes Elementary
Concord · Public elementary · Grades K–5
732 students · 1.9 km away
Sun Terrace Elementary
Concord · Public elementary · Grades K–5
418 students · 2.0 km away
El Monte Elementary
Concord · Public elementary · Grades K–5
418 students · 2.6 km away
Monte Gardens Elementary
Concord · Public elementary · Grades K–5
562 students · 2.7 km away
Cambridge Elementary
Concord · Public elementary · Grades K–5
469 students · 3.3 km away
Valley View Middle
Pleasant Hill · Public middle · Grades 6–8
819 students · 3.4 km away
College Park High
Pleasant Hill · Public high · Grades 9–12
1,948 students · 3.6 km away
Similar schools
Public high schools in California with a comparable Enrollment.
Robert F. Kennedy High
Delano · Public high · Grades 9–12
1,394 students
Monterey High
Monterey · Public high · Grades 9–12
1,401 students
Rancho Mirage High
Rancho Mirage · Public high · Grades 9–12
1,401 students
Esperanza High
Anaheim · Public high · Grades 9–12
1,393 students
Pioneer High
San Jose · Public high · Grades 9–12
1,393 students
Lawndale High
Lawndale · Public high · Grades 9–12
1,403 students
Frequently asked questions
Is Mt. Diablo High a good school?
Mt. Diablo High has a Success Index (US) of 18.5 out of 100 (Lower 50% of high schools in United States) and ranks #1148 of 1,343 in California. The index summarises published data about the school community and, where available, attainment; it does not measure teaching quality, so visit the school and ask about support at your child's level.
Where does Mt. Diablo High rank in California?
Mt. Diablo High ranks #1148 of 1,343 high schools in California and #15532 of 16,910 nationally on the Success Index (US) (2025 data).
How many students attend Mt. Diablo High?
Mt. Diablo High had 1,397 students in 2025.
Is Mt. Diablo High a elementary school or a high school?
Mt. Diablo High is classified as a high covering Grades 9–12. It is a public school.
What other schools are near Mt. Diablo High?
There are 10 schools within 15 km of Mt. Diablo High; they are listed on this page with their Success Index (US) and distance, and can be compared side by side.