Average
#6450 of 9,539 schools in CA
Mt. Diablo High
High School · Mt. Diablo Unified
2450 Grant St., Concord, CA 94520
Enrollment
1,477
Student-Teacher
20:1
Score
5.5
Grades
9th – 12th
Enrollment
1,477
Student-Teacher
20:1
Score
5.5
Grades
9th – 12th
Data vintage
2022-23
Data vintage2022-23
How this school compares
California schools
#6,450 of 9,539
In Concord
#7 of 23
public schools
In district
#21 of 47
Mt. Diablo Unified
Academic growth
8.3 / 10
Excellent
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Mt. Diablo High
High School in Concord · grades 9th – 12th. Start here, then compare fit against nearby and district options.
Queen of All Saints School
0.1 mi away. Use as a geographic alternative in the same move search.
Queen of All Saints Elementary
0.1 mi away. Use as a geographic alternative in the same move search.
About Mt. Diablo High
Mt. Diablo High is a public high school in Concord, CA, part of Mt. Diablo Unified.
Mt. Diablo High serves approximately 1,477 students, and covers grades 9th-12th, and has a 20:1 student-teacher ratio. Mt.
Diablo High has a current MySchoolScout rating of 5.5 out of 10 and ranks #6,450 of 9,539 schools in CA. Structured state assessment records for Mt. Diablo High show 22% math proficiency (multi-year average, 2009-2024) and 38% reading/ELA proficiency (multi-year average, 2009-2024).
- This school 5.5 · Average
- District avg 6.2
- CA avg 6.5
What Parents Should Know
Test scores at Mt. Diablo High sit below average, but its growth scores are strong: students here make above-average progress year over year. The raw numbers haven't caught up, but a school that keeps moving kids forward is doing the harder, more important work.
44% of students at Mt. Diablo High were chronically absent in the 2022-23 school year, above the national average. Chronic absenteeism means missing 15 or more school days, and at high rates it drags on classroom pacing for everyone. Ask what the school does to help families get kids to class consistently.
Score Breakdown
Full Profile · 4/4 metricsView breakdown
View breakdown
View breakdown
View breakdown
Mt. Diablo High — Students at Mt. Diablo High score 21% proficient, which is below what's typical for similar communities (expected: 40%).
Equity & Diversity
Shown separately, not included in overall scoreFree/Reduced Lunch
61.9%
Students qualifying for federal meal assistance
Test Scores CA CAASPP (2023-24)
Based on 30 test records from CA state assessments. About our data
Proficiency Trend
→ StableAverage proficiency (% at or above grade level) across Math & ELA over time.
* COVID-affected year — test participation was uneven nationwide. This data is weighted at 50% in the Growth score calculation.
Source: EdFacts (NCES) and state assessment data. Growth score: 8.3/10.
How Mt. Diablo High Compares
See how Mt. Diablo High performs across key quality dimensions compared to state benchmarks.
Funding & Resources
Programs & Offerings
Data as of 2021-22 · Source: CRDC via Urban Institute · Learn more
Location
2450 Grant St., Concord, CA 94520
Nearby Alternatives
Families considering Mt. Diablo High may also want to explore other high schools in the area. THE CONCORDIA SCHOOL (rated 6.9/10, 1.0 miles away), which scores notably higher. Another option is DE LA SALLE ACADEMY (rated 6.6/10, 0.8 miles away), which scores notably higher. Additionally, ANOVA CENTER FOR EDUCATION (rated 6.5/10, 1.1 miles away), which scores slightly higher. For more schools in Concord, see our Concord schools guide .
Nearby Schools
20 within 1.1 mi| School | Distance | Rating |
|---|---|---|
| QUEEN OF ALL SAINTS SCHOOL Concord | 0.1 mi | 6.3 |
| Queen of All Saints Elementary Concord | 0.1 mi | — |
| BEGINNINGS & BEYOND MONTESSORI Concord | 0.4 mi | — |
| Olympic Continuation High Concord | 0.5 mi | 5.9 |
| Crossroads High Concord | 0.5 mi | — |
| Orion Academy Concord | 0.7 mi | — |
| Building Connections Academy Concord | 0.7 mi | — |
| Rocketship Futuro Academy Redwood City | 0.9 mi | 4.2 |
| Glenbrook Academy Concord | 0.9 mi | — |
| MONTESSORI SCHOOL OF CONCORD Concord | 0.7 mi | — |
| DE LA SALLE ACADEMY Concord | 0.8 mi | 6.6 |
| De La Salle Academy, Inc. Concord | 0.8 mi | — |
| Holbrook Language Academy Concord | 0.9 mi | 3.4 |
| Floyd I. Marchus Concord | 1.0 mi | 4.5 |
| THE CONCORDIA SCHOOL Concord | 1.0 mi | 6.9 |
| Meadow Homes Elementary Concord | 1.2 mi | 2.9 |
| Sun Terrace Elementary Concord | 1.3 mi | 3.0 |
| Anova Center for Education, Contra Costa Concord | 1.1 mi | — |
| ANOVA CENTER FOR EDUCATION Concord | 1.1 mi | 6.5 |
| Wren Avenue Elementary Concord | 1.1 mi | 3.7 |
Neighborhood Census ACS (2019-2023)
Census data for ZIP 94520 (ACS 2019-2023 5-Year Estimates) · Data sources
Median Income
$79,790
Median Home Value
$572,400
Median Rent
$2,118/mo
Population
36,767
College Educated
29.9%
Homeownership
37.4%
Avg Commute
30.2 min
Poverty Rate
12.9%
Median Age
34.6
Similar Schools
Schools in the same state with comparable level, size, and ratings
| School | Rating |
|---|---|
| Atwater High Atwater, CA | 5.5 |
| Glendale High Glendale, CA | 5.5 |
| River Valley High Yuba City, CA | 5.5 |
| Tracy High Tracy, CA | 5.5 |
| Union Mine High El Dorado, CA | 5.5 |
| Valley Center High Valley Center, CA | 5.5 |
Frequently Asked Questions
Common questions about Mt. Diablo High
What grades does Mt. Diablo High serve?
Mt. Diablo High serves students in grades 9th through 12th.
How many students attend Mt. Diablo High?
Mt. Diablo High has an enrollment of approximately 1,477 students.
What is the student-teacher ratio at Mt. Diablo High?
The student-teacher ratio at Mt. Diablo High is 20:1. A lower ratio generally means more individual attention per student. The national average is approximately 16:1 for public schools.
How does Mt. Diablo High rank in CA?
Mt. Diablo High ranks #6,450 of 9,539 schools in CA.
What is Mt. Diablo High's MySchoolScout rating?
Mt. Diablo High has a current MySchoolScout rating of 5.5 out of 10. This score combines the level-appropriate components shown in the rating breakdown; equity data is shown separately for context.
What are the test scores at Mt. Diablo High?
Based on loaded state assessment records, Mt. Diablo High has 22% math proficiency (multi-year average, 2009-2024) and 38% reading/ELA proficiency (multi-year average, 2009-2024).
Is Mt. Diablo High a charter school?
No, Mt. Diablo High is not a charter school. It is a traditional public school operated by the local school district.
Is Mt. Diablo High a Title I school?
No, Mt. Diablo High is not currently a Title I school.
What does the Free & Reduced Lunch percentage mean for Mt. Diablo High?
61.9% of students at Mt. Diablo High qualify for free or reduced-price lunch. This is a commonly used indicator of economic need and provides important context when interpreting test scores.
Neighborhood Context
Powered by 
Quick Facts NCES CCD (SY 2022-23)
- Grades
- 9th – 12th
- Enrollment
- 1,477
- Student-Teacher Ratio
- 20:1
- Teachers (FTE)
- 74
- Free/Reduced Lunch
- 61.9%
- Type
- regular
- Setting
- Large Suburb
- County
- Contra Costa County
- Chronic Absenteeism (SY 2022-23)
- 43.8%
- Phone
- (925) 682-4030
- 4-Year Graduation
- 85.0%
Resources & Links
District
Mt. Diablo Unified- District Enrollment
- 29,356
- Schools in District
- 52
- Per-Pupil Spending
- $15,421
- District Rank
- #21 of 47
Other Schools in This District
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