Mt. Diablo High School
High school in Concord, CA · Mt. Diablo Unified · Grades 9-12
On the spring 2026 state tests, 30% of Mt. Diablo High School students met or exceeded California's reading (ELA) standard and 12% met the math standard. In reading, that is 19 points below the Mt. Diablo Unified average (49%) and 19 points below the California average (49%). Its reading result is higher than 10% of Bay Area high schools, and it ranks 4th of 4 public high schools in Concord. Reading results in 2026 were 2 points lower than in 2024, and math results were 2 points higher than in 2024.
Test scores, 2024 to 2026
| Subject | Spring 2024 | Spring 2025 | Spring 2026 | Change |
|---|---|---|---|---|
| Reading (ELA) | 32% | 38% | 30% | −2 pts |
| Math | 10% | 12% | 12% | +2 pts |
Compared with nearby averages
| Spring 2026 | Reading (ELA) | Math |
|---|---|---|
| Mt. Diablo High School | 30% | 12% |
| Mt. Diablo Unified | 49% | 39% |
| Contra Costa County | 52% | 43% |
| California | 49% | 38% |
Where graduates go
Share of the class of 2022-23 enrolled in college within 16 months of graduating.
For fall 2025, UC admitted 26 of 36 freshman applicants from Mt. Diablo High School (72%), and 8 enrolled.
Homes near Mt. Diablo High School
The typical home value in ZIP code 94520, where Mt. Diablo High School is located, is $601K, up 0.7% over the past year (Zillow Home Value Index). Prices inside the school's attendance zone can differ.
Zillow and Redfin can both search for homes inside a school’s attendance zone and email you new listings. Search for the school by name on either site and save the search.
Nearby high schools
| Distance | School | Reading (ELA) | Math | Typical home value (ZIP) |
|---|---|---|---|---|
| 2.3 mi | College Park HighPleasant Hill · Grades 9-12 | 67% | 44% | $969K |
| 2.6 mi | Concord HighConcord · Grades 9-12 | 40% | 17% | $772K |
| 3.3 mi | Ygnacio Valley HighConcord · Grades 9-12 | 37% | 17% | $825K |
| 4.4 mi | Clayton Valley Charter High CharterConcord · Grades 9-12 | 77% | 45% | $772K |
| 5.3 mi | Northgate HighWalnut Creek · Grades 9-12 | 83% | 61% | $1.37M |
| 5.5 mi | Alhambra Senior HighMartinez · Grades 9-12 | 63% | 30% | $749K |
School details
- Address
- 2450 Grant Street, Concord, CA 94520
Get directions · See it on our map - Phone
- (925) 682-4030
- District
- Mt. Diablo Unified
- County
- Contra Costa County
- Grades
- 9-12
- Students
- 1,389 (2025-26)
- Type
- High school · Traditional
- Website
- www.mdusd.org
- State school code
- 07617540734566
Common questions
How did Mt. Diablo High School do on state tests?
In spring 2026, 30% of students met or exceeded the reading (ELA) standard and 12% met the math standard, compared with 49% and 38% across California.
How many students attend Mt. Diablo High School?
1,389 students were enrolled in the 2025-26 school year, in grades 9-12.
How many Mt. Diablo High School students get into UC?
For fall 2025, 26 of 36 UC freshman applicants from Mt. Diablo High School were admitted. Of the class of 2022-23, 3% enrolled at a UC campus within 16 months.
How much do homes cost near Mt. Diablo High School?
The typical home value in ZIP code 94520, where Mt. Diablo High School is located, is $601K, up 0.7% over the past year (Zillow Home Value Index). Prices inside the school's attendance zone can differ.
Does living near Mt. Diablo High School guarantee a spot?
No. Public schools assign students by attendance zone, which Mt. Diablo Unified sets and can change. Confirm the zone for a specific address with the district before you buy or rent.