Granite Hills High School, established in 1999, is one of the eleven high schools in Porterville, Tulare County, California. Jacob Bowker is the principal. A previous principal was Apolinar Marroquin.
Serving 1,206 students in grades 9-12, Granite Hills High School ranks in the top 50% of all schools in California for overall test scores (math proficiency is bottom 50%, and reading proficiency is bottom 50%).
The percentage of students achieving proficiency in math is 21% (which is lower than the California state average of 34%). The percentage of students achieving proficiency in reading/language arts is 53% (which is higher than the California state average of 47%).
The student-teacher ratio of 22:1 is higher than the California state level of 21:1.
Minority enrollment is 94% of the student body (majority Hispanic), which is higher than the California state average of 80% (majority Hispanic).
Quick Facts (2026)
- Grades: 9-12
- Enrollment: 1,206 students
- Student-Teacher Ratio: 22:1
- Minority Enrollment: 94%
- Graduation Rate: 93% (Top 30% in CA)
- Overall Testing Rank: Top 50%
- Math Proficiency: 21% (Btm 50%)
- Reading Proficiency: 53% (Top 50%)
- Science Proficiency: 14% (Btm 50%)
- Source: National Center for Education Statistics (NCES), CA Dept. of Education
Top Rankings
Granite Hills High School ranks among the top 20% of public schools in California for:
Category
Attribute
Most improved public schools
School Overview
Granite Hills High School's student population of 1,206 students has stayed relatively flat over five school years.
The teacher population of 55 teachers has stayed relatively flat over five school years.
Grades Offered
Grades 9-12
Total Students
1,206 students
Total Classroom Teachers
55 teachers
Last Day of School
Wed. Jun 10, 2026
School Rankings
Granite Hills High School ranks within the top 50% of all 9,523 schools in California (based off of combined math and reading proficiency testing data).
The diversity score of Granite Hills High School is 0.19, which is less 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
#4546 out of 9523 schools
(Top 50%)
(Top 50%)
Math Test Scores (% Proficient)
21%
34%
Reading/Language Arts Test Scores (% Proficient)
53%
47%
Science Test Scores (% Proficient)
14%
29%
Student-Teacher Ratio
22:1
21:1
American Indian
1%
1%
Asian
1%
12%
Hispanic
90%
56%
Black
1%
5%
White
6%
20%
Hawaiian
n/a
n/a
Two or more races
1%
6%
All Ethnic Groups
Graduation Rate
93%
87%
Eligible for Free Lunch
91%
54%
Eligible for Reduced Lunch
4%
8%
School Statewide Testing
School District Name
Source: National Center for Education Statistics (NCES), CA Dept. of Education
Frequently Asked Questions
What is Granite Hills High School's ranking?
Granite Hills High School is ranked #4546 out of 9,523 schools, which ranks it among the top 50% of public schools in California.
What percent of students have achieved state testing proficiency in math and reading?
21% of students have achieved math proficiency (compared to the 34% CA state average), while 53% of students have achieved reading proficiency (compared to the 47% CA state average).
What is the graduation rate of Granite Hills High School?
The graduation rate of Granite Hills High School is 93%, which is higher than the California state average of 87%.
How many students attend Granite Hills High School?
1,206 students attend Granite Hills High School.
What is the racial composition of the student body?
90% of Granite Hills High School students are Hispanic, 6% of students are White, 1% of students are American Indian, 1% of students are Asian, 1% of students are Black, and 1% of students are Two or more races.
What is the student-teacher ratio of Granite Hills High School?
Granite Hills High School has a student ration of 22:1, which is higher than the California state average of 21:1.
What grades does Granite Hills High School offer ?
Granite Hills High School offers enrollment in grades 9-12
What school district is Granite Hills High School part of?
Granite Hills High School is part of Porterville Unified School District.
School Calendar
View the Granite Hills High School yearly calendar below.
School Reviews
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