Grade Trends

Mt. Diablo High

Grades 9–12 Public District: Mt. Diablo Unified

2450 Grant St., Concord, CA 94520 Map

Math (met standard)
12%
−20 state 32% · 2025-26
English (met standard)
30%
−27 state 57% · 2025-26
Science (met standard)
15%
−23 state 38% · 2025-26
Low income
80%
free or reduced-price lunch
Students
1,397
2024-25
Students per teacher
19.8
2024-25

Test score trends

Share of students who met or exceeded the state standard each year.

Latest results by grade

Grade Math English Science
Grade 11 12% state 32% · 2025-26 30% state 57% · 2025-26 —
All grades 12% state 32% · 2025-26 30% state 57% · 2025-26 15% state 38% · 2025-26
Results by year (all grades)
School year Math English Science
2025-26 12% state 32% 30% state 57% 15% state 38%
2024-25 13% state 31% 38% state 57% 11% state 34%
2023-24 10% state 28% 32% state 56% 11% state 32%
2022-23 13% state 27% 38% state 55% 13% state 32%
2021-22 10% state 27% 27% state 55% 9% state 30%
2020-21 24% state 34% 48% state 59% 20% state 30%
2018-19 15% state 32% 37% state 57% 10% state 29%
2017-18 20% state 31% 50% state 56% —
2016-17 17% state 32% 46% state 60% —
2015-16 14% state 32% 36% state 59% —
2014-15 13% state 30% 34% state 56% —

Graduation & college

4-year graduation rate
93%
state 88% · 2025-26
Graduates meeting UC/CSU (A–G)
25%
state 55% · 2025-26
College-going rate
57%
state 66% · 2022-23

Graduation rate: students who earned a regular diploma within four years. UC/CSU: share of graduates who completed the A–G courses required by the University of California and California State University. College-going: share of high school completers who enrolled in any college within 12 months.

Students

Race and ethnicity, 2024-25

Year-by-year history is loaded from the NCES Common Core of Data (2017-18 onward).

Nearby schools

Subject percentages show the share of students who met or exceeded the state standard.

Pick to compare
Olympic High
Grades 9–12 Alternative · Mt. Diablo Unified
0.5 mi
3%
−29 vs state
9%
−48 vs state
6%
−32 vs state
5% Average of math, English and science: 1% in 2022-23 → 6% in 2025-26 90% 233 Hispanic 75%
Crossroads High
Grades 7–12 Alternative · Mt. Diablo Unified
0.5 mi
0%
−32 vs state · 2015-16
8%
−51 vs state · 2015-16
0%
−26 vs state · 2018-19
Not enough years of data 92% 12 Hispanic 83%
Floyd I. Marchus
Grades K–12 Special education · Contra Costa County Office of Education
1.0 mi
0%
10%
13%
Average of math, English and science: 7% in 2022-23 → 8% in 2025-26 60% 50 Black 39%
College Park High
Grades 9–12 · Mt. Diablo Unified
2.2 mi
44%
+12 vs state
67%
+10 vs state
42%
+4 vs state
5% Average of math, English and science: 56% in 2022-23 → 51% in 2025-26 41% 1,948 White 39%
Concord High
Grades 9–12 · Mt. Diablo Unified
2.6 mi
17%
−15 vs state
40%
−17 vs state
20%
−19 vs state
Average of math, English and science: 24% in 2022-23 → 26% in 2025-26 70% 1,137 Hispanic 58%
Mt. McKinley
Grades 7–12 Alternative · Contra Costa County Office of Education
2.9 mi
0%
0%
0%
Not enough years of data 93% 42 Black 45%
Ygnacio Valley High
Grades 9–12 · Mt. Diablo Unified
3.4 mi
17%
−15 vs state
37%
−20 vs state
21%
−17 vs state
5% Average of math, English and science: 20% in 2022-23 → 25% in 2025-26 81% 1,059 Hispanic 78%
Horizons School: Independent Study
Grades K–12 Alternative · Mt. Diablo Unified
3.6 mi
39%
+4 vs state
51%
−2 vs state
26%
−11 vs state
3% Average of math, English and science: 35% in 2022-23 → 38% in 2025-26 46% 182 Hispanic 45%
Prospect High (Continuation)
Grades 9–12 Alternative · Mt. Diablo Unified
3.6 mi
9%
−23 vs state
0%
−57 vs state
0%
Average of math, English and science: 4% in 2022-23 → 5% in 2025-26 67% 60 Hispanic 68%
Contra Costa School of Performing Arts
Grades 6–12 Charter · Contra Costa School of Performing Arts District
3.7 mi
19%
−16 vs state · 2024-25
41%
−9 vs state · 2024-25
29%
−4 vs state · 2024-25
Average of math, English and science: 29% in 2021-22 → 30% in 2024-25 29% 285 Hispanic 43%