Average
#6450 of 9,539 schools in CA
Mt. Diablo High
High School · Mt. Diablo Unified · Concord, CA
A Mt. Diablo Unified high school where students score 18 points below what's typical for similar communities.
2450 Grant St., Concord, CA 94520
- Math 10% vs CA 32% (2024)
- Reading 32% vs CA 52% (2024)
- 85.0% 4-year graduation
Academics
Full Profile · 4/4 metricsView breakdown
View breakdown
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Students at Mt. Diablo High score 21% proficient, which is below what's typical for similar communities (expected: 40%).
2024 CAASPP proficiency
Most recent published year. School vs. CA average.
Trend
→ SteadyProficiency is down 13 points across the 16-year record (2009–2024) and has held near 21% recently.
Show all 14 years
Multi-year averages used by the rating model: math 22% (multi-year average, 2009-2024) · reading/ELA 38% (multi-year average, 2009-2024)
* COVID-affected year — test participation was uneven nationwide. This data is weighted at 50% in the Growth score calculation.
Based on 30 test records from CA state assessments and EdFacts (NCES).
Equity & diversity
Shown separately, not included in the overall scoreFree/reduced lunch
61.9%
Students qualifying for federal meal assistance
How we rate schools
A clear 1–10 score built from public data — growth, academics, and learning environment. No hidden criteria, no pay-to-play.
See how we rateThe neighborhood
Where Mt. Diablo High sits, and what the surrounding area looks like.
Nearby same-level schools are colored by their score. Pins are locations, not attendance boundaries. Open the San Francisco Bay Area map →
Getting around & local context
- Walk 75Very Walkable
- Transit 46Some Transit
- Bike 63Bikeable
- City Safety: High3,431/100K
Powered by
FBI Uniform Crime Reporting · 2024 · city context (Concord), not school-level safety or attendance eligibility. Source details
Source period: 2024. Freshness not available.
Area profileU.S. Census ACS 5-year estimates (ACS 2019–2023 5-year estimates)
Median income
$79,790
Median home value
$572,400
Median rent
$2,118/mo
College educated
29.9%
Homeownership
37.4%
Poverty rate
12.9%
ACS 2019–2023 5-year estimates for the ZCTA associated with school ZIP 94520; this is area context, not an attendance boundary.
Programs & students
Programs & Offerings
Compare nearby
Nearby same-level schools
4 from a 5-mile search; district fallback available
| School | Score | Grades | Distance | Enrollment | Compare |
|---|---|---|---|---|---|
| Crossroads HighEnrollment path unverified | Not rated | 7–12 | 0.5 mi | 18 | Compare → |
| Olympic Continuation HighEnrollment path unverified | 5.9 | 9–12 | 0.5 mi | 240 | Compare → |
| Orion AcademyPrivate · tuition | Not rated | 9–12 | 0.7 mi | 30 | Compare → |
| Glenbrook AcademyEnrollment path unverified | Not rated | 6–12 | 0.9 mi | 16 | Compare → |
Distance is proximity only; it is not attendance eligibility.
Enrollment path unverified: Potential public school; its attendance or application path has not been classified.
Private · tuition: Potential private option; tuition and admission requirements have not been verified.
Mt. Diablo Unified
- Schools in district
- 52
- Rank in district
- #21 of 47
- District spending per student
- $15,421NCES F-33 · FY 2023 · This annual source is three years behind the current year.
- District child poverty rate
- 9.8%Census SAIPE · 2024
Mt. Diablo High is listed in Mt. Diablo Unified; a district label does not verify attendance for an address.
About Mt. Diablo High
Mt. Diablo High is a public high school in Concord, CA, part of Mt. Diablo Unified, serving approximately 1,477 students in grades 9th-12th with a 20:1 student-teacher ratio.
It holds a MySchoolScout rating of 5.5 out of 10 and ranks #6,450 of 9,539 schools in CA. State assessment records show 22% math proficiency (multi-year average, 2009-2024) and 38% reading/ELA proficiency (multi-year average, 2009-2024).
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.
School factsNCES Common Core of Data (CCD) (SY 2023–24)
- Grades
- 9th – 12th
- Enrollment
- 1,477
- Student-Teacher Ratio
- 20:1
- Teachers (FTE)
- 74
- 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%
- Area population (ZIP 94520)
- 36,767
- Area average commute
- 30.2 min
- Area median age
- 34.6
Official sources & links
About this school's data
Every number on this page comes from a published source with a stated period. Where a source is partial, aging, or describes a surrounding area rather than the school, that limitation is named below.
- School directory (enrollment, grades, staff, contact)
- NCES Common Core of Data (CCD) · SY 2023–24 · Medium confidence
- Source period: SY 2023–24. A newer release may be available.
- MySchoolScout rating and rank
- MySchoolScout ranking model · Low confidence
- Vintage not available. Do not use this measure alone.
- Derived as a weighted blend of the component scores shown in Academics from state assessment, EdFacts growth, and NCES resource records.
- Math proficiency
- State department of education · 2024 CAASPP · Medium confidence
- Available for part of the eligible units; results may not represent the full area.
- Source period: 2024 CAASPP. A newer release may be available.
- Derived from source records rather than read directly from one field.
- Reading/ELA proficiency
- State department of education · 2024 CAASPP · Medium confidence
- Available for part of the eligible units; results may not represent the full area.
- Source period: 2024 CAASPP. A newer release may be available.
- Derived from source records rather than read directly from one field.
- Student progress (growth)
- NCES EdFacts · Mixed source periods · Low confidence
- Vintage not available. Do not use this measure alone.
- Available for part of the eligible units; results may not represent the full area.
- Derived as the fitted year-over-year slope of proficiency from multi-year assessment records.
- Neighborhood (income, housing, education)
- U.S. Census ACS 5-year estimates · ACS 2019–2023 5-year estimates · Low confidence
- Older source: ACS 2019–2023 5-year estimates. Use as historical context.
- Reported for the ZCTA for ZIP 94520; this does not measure the attendance area.
- Programs (AP/IB, athletics, gifted)
- CRDC via Urban Institute · SY 2021–22 · Medium confidence
- Available for part of the eligible units; results may not represent the full area.
- Source period: SY 2021–22. A newer release may be available.
Evidence periods: Rating mixed/unknown input periods; assessments multi-year average, 2009-2024; directory SY 2023–24
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