Castro Valley High School is located in the unincorporated suburban community of Castro Valley, California, United States. It is a high school for grades 9 to 12. Named a National Exemplary School in 1984–85 and 1988–89, it was a California Distinguished School in 1987–88, 2000–01, and 2009.
Serving 2,874 students in grades 9-12, Castro Valley High School ranks in the top 20% of all schools in California for overall test scores (math proficiency is top 20%, and reading proficiency is top 20%).
The percentage of students achieving proficiency in math is 52% (which is higher than the California state average of 34%). The percentage of students achieving proficiency in reading/language arts is 78% (which is higher than the California state average of 47%).
The student-teacher ratio of 24:1 is higher than the California state level of 21:1.
Minority enrollment is 79% of the student body (majority Asian), which is lower than the California state average of 80% (majority Hispanic).
Quick Facts (2026)
- Grades: 9-12
- Enrollment: 2,874 students
- Student-Teacher Ratio: 24:1
- Minority Enrollment: 79%
- Graduation Rate: 96% (Top 10% in CA)
- Overall Testing Rank: Top 20%
- Math Proficiency: 52% (Top 20%)
- Reading Proficiency: 78% (Top 10%)
- Science Proficiency: 48% (Top 20%)
- Source: National Center for Education Statistics (NCES), CA Dept. of Education
Top Rankings
Castro Valley High School ranks among the top 20% of public schools in California for:
Category
Attribute
Overall Rank
Math Proficiency
Reading/Language Arts Proficiency
Science Proficiency
Graduation Rate
Diversity
School Overview
Castro Valley High School's student population of 2,874 students has grown by 8% over five school years.
The teacher population of 122 teachers has grown by 5% over five school years.
Grades Offered
Grades 9-12
Total Students
2,874 students
Total Classroom Teachers
122 teachers
Year Founded
1956
Campus Size
20 acres
School Motto
Safety Togetherness Aspire Never give up Diversity
School Rankings
Castro Valley High School ranks within the top 20% of all 9,523 schools in California (based off of combined math and reading proficiency testing data).
The diversity score of Castro Valley High School is 0.75, which is more than the diversity score at state average of 0.63. The school's diversity has stayed relatively flat over five school years.
Overall Testing Rank
#1105 out of 9523 schools
(Top 20%)
(Top 20%)
Math Test Scores (% Proficient)
52%
34%
Reading/Language Arts Test Scores (% Proficient)
78%
47%
Science Test Scores (% Proficient)
48%
29%
Student-Teacher Ratio
24:1
21:1
American Indian
n/a
1%
Asian
36%
12%
Hispanic
26%
56%
Black
5%
5%
White
21%
20%
Hawaiian
n/a
n/a
Two or more races
12%
6%
All Ethnic Groups
Graduation Rate
96%
87%
Eligible for Free Lunch
28%
54%
Eligible for Reduced Lunch
12%
8%
School Statewide Testing
School District Name
Source: National Center for Education Statistics (NCES), CA Dept. of Education
School Notes
- School Mascot: Trojan
Frequently Asked Questions
What is Castro Valley High School's ranking?
Castro Valley High School is ranked #1105 out of 9,523 schools, which ranks it among the top 20% of public schools in California.
What percent of students have achieved state testing proficiency in math and reading?
52% of students have achieved math proficiency (compared to the 34% CA state average), while 78% of students have achieved reading proficiency (compared to the 47% CA state average).
What is the graduation rate of Castro Valley High School?
The graduation rate of Castro Valley High School is 96%, which is higher than the California state average of 87%.
How many students attend Castro Valley High School?
2,874 students attend Castro Valley High School.
What is the racial composition of the student body?
36% of Castro Valley High School students are Asian, 26% of students are Hispanic, 21% of students are White, 12% of students are Two or more races, and 5% of students are Black.
What is the student-teacher ratio of Castro Valley High School?
Castro Valley High School has a student ration of 24:1, which is higher than the California state average of 21:1.
What grades does Castro Valley High School offer ?
Castro Valley High School offers enrollment in grades 9-12
What school district is Castro Valley High School part of?
Castro Valley High School is part of Castro Valley Unified School District.
School Reviews
2 10/10/2025
This school has a bullying problem and esculates when you tell staff about it. So many students suffer in misery as there lives are made miserable. These girl students are very vicious and threaten other students to join in with their viciousness.
Review Castro Valley High School. Reviews should be a few sentences in length. Please include any comments on:
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