Westlake High School is a public high school in the Westlake neighborhood of Thousand Oaks, in Ventura County, California. Westlake High School serves grades 9–12 in the Conejo Valley Unified School District. Middle schools that feed into Westlake include Colina Middle School and Los Cerritos Middle School.
Serving 1,900 students in grades 9-12, Westlake High School ranks in the top 20% of all schools in California for overall test scores (math proficiency is top 30%, and reading proficiency is top 30%).
The percentage of students achieving proficiency in math is 46% (which is higher than the California state average of 34%). The percentage of students achieving proficiency in reading/language arts is 73% (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 49% of the student body (majority Hispanic), which is lower than the California state average of 80% (majority Hispanic).
Quick Facts (2026)
- Grades: 9-12
- Enrollment: 1,900 students
- Student-Teacher Ratio: 24:1
- Minority Enrollment: 49%
- Graduation Rate: ≥99% (Top 1% in CA)
- Overall Testing Rank: Top 20%
- Math Proficiency: 46% (Top 30%)
- Reading Proficiency: 73% (Top 10%)
- Science Proficiency: 50% (Top 20%)
- Source: National Center for Education Statistics (NCES), CA Dept. of Education
Top Rankings
Westlake High School ranks among the top 20% of public schools in California for:
Category
Attribute
Overall Rank
Reading/Language Arts Proficiency
Science Proficiency
Graduation Rate
Diversity
School Overview
Westlake High School's student population of 1,900 students has declined by 13% over five school years.
The teacher population of 80 teachers has declined by 8% over five school years.
Grades Offered
Grades 9-12
Total Students
1,900 students
Total Classroom Teachers
80 teachers
Year Founded
1978
Colors
White, Blue
School Calendar
Last Day of School
Fri. Jun 12, 2026
School Rankings
Westlake 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 Westlake High School is 0.65, 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
#1677 out of 9523 schools
(Top 20%)
(Top 20%)
Math Test Scores (% Proficient)
46%
34%
Reading/Language Arts Test Scores (% Proficient)
73%
47%
Science Test Scores (% Proficient)
50%
29%
Student-Teacher Ratio
24:1
21:1
American Indian
n/a
1%
Asian
12%
12%
Hispanic
28%
56%
Black
2%
5%
White
51%
20%
Hawaiian
n/a
n/a
Two or more races
7%
6%
All Ethnic Groups
Graduation Rate
≥99%
87%
Eligible for Free Lunch
17%
54%
Eligible for Reduced Lunch
1%
8%
School Statewide Testing
School District Name
Source: National Center for Education Statistics (NCES), CA Dept. of Education
Frequently Asked Questions
What is Westlake High School's ranking?
Westlake High School is ranked #1677 out of 9,523 schools, which ranks it among the top 20% of public schools in California.
What schools are Westlake High School often compared to?
Westlake High Schoolis often viewed alongside schools like Oak Park Independent, Oak Park High School, Thousand Oaks High School by visitors of our site.
What percent of students have achieved state testing proficiency in math and reading?
46% of students have achieved math proficiency (compared to the 34% CA state average), while 73% of students have achieved reading proficiency (compared to the 47% CA state average).
What is the graduation rate of Westlake High School?
The graduation rate of Westlake High School is 99%, which is higher than the California state average of 87%.
How many students attend Westlake High School?
1,900 students attend Westlake High School.
What is the racial composition of the student body?
51% of Westlake High School students are White, 28% of students are Hispanic, 12% of students are Asian, 7% of students are Two or more races, and 2% of students are Black.
What is the student-teacher ratio of Westlake High School?
Westlake High School has a student ration of 24:1, which is higher than the California state average of 21:1.
What grades does Westlake High School offer ?
Westlake High School offers enrollment in grades 9-12
What school district is Westlake High School part of?
Westlake High School is part of Conejo Valley Unified School District.
School Reviews
2 10/10/2025
If one likes being w/ a racist, ignorant, arrogant, over-competitive, self- centered, uninviting snob then W.H.S is the best school for you because there are plenty of individuals like that. Oh, and if your son/daughter is planning on taking honors this year brace yourselves for they will experience the mental abuse of your lifetime because here at Westlake we like to prepare our students for life by completely lowering their self-esteems. Westlake high school's campus is pretty on the outside but what goes on inside is ugly... just like their students.
5 10/10/2025
Westlake High School is an amazing school. Kis who are interested in learning will be very academically challenged in the honors classes. The sports and music programs are outstanding. People move from from many other areas to attend schools in the Conejo Valley and Westlake High School upholds that reputation. We would choose this school over Oaks Christian anyday.
2 10/10/2025
Academic quality suffers from school refusal to allow students full use of 21st century technologies. Many teachers mired in administrative 70's era policies and mindset. Extracurricular activities are only accessible to those who can afford to pay thousands of dollars for them. Facilities are a little better than some other public high schools in the area. Parent involvement is restricted by administration. Many teachers are inaccessible to students and parents alike.
Review Westlake High School. Reviews should be a few sentences in length. Please include any comments on:
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