Los Altos High School is a comprehensive four-year public education high school located in the bedroom community of Hacienda Heights, California, United States, in eastern Los Angeles County. It should not be confused with the Los Altos High School located in the city of Los Altos, California.
Serving 1,592 students in grades 9-12, Los Altos 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 18% (which is lower than the California state average of 34%). The percentage of students achieving proficiency in reading/language arts is 71% (which is higher than the California state average of 47%).
The student-teacher ratio of 23:1 is higher than the California state level of 21:1.
Minority enrollment is 97% 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: 1,592 students
- Student-Teacher Ratio: 23:1
- Minority Enrollment: 97%
- Graduation Rate: 97% (Top 5% in CA)
- Overall Testing Rank: Top 50%
- Math Proficiency: 18% (Btm 50%)
- Reading Proficiency: 71% (Top 20%)
- Science Proficiency: 22% (Btm 50%)
- Source: National Center for Education Statistics (NCES), CA Dept. of Education
Top Rankings
Los Altos High School ranks among the top 20% of public schools in California for:
Category
Attribute
Reading/Language Arts Proficiency
Graduation Rate
School Overview
Los Altos High School's student population of 1,592 students has declined by 8% over five school years.
The teacher population of 70 teachers has stayed relatively flat over five school years.
Grades Offered
Grades 9-12
Total Students
1,592 students
Total Classroom Teachers
70 teachers
Year Founded
1958
Colors
White, Red, Royal blue
School Calendar
School Motto
Conquerors Think, Thinkers Conquer
School Rankings
Los Altos 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 Los Altos 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
#3925 out of 9523 schools
(Top 50%)
(Top 50%)
Math Test Scores (% Proficient)
18%
34%
Reading/Language Arts Test Scores (% Proficient)
71%
47%
Science Test Scores (% Proficient)
22%
29%
Student-Teacher Ratio
23:1
21:1
Asian
6%
12%
Hispanic
90%
56%
White
3%
20%
Two or more races
1%
6%
All Ethnic Groups
Graduation Rate
97%
87%
Chronically Absent Students
(22-23)20.1%
27.7%
Eligible for Free Lunch
54%
54%
Eligible for Reduced Lunch
16%
8%
School Statewide Testing
School District Name
Source: National Center for Education Statistics (NCES), CA Dept. of Education
School Notes
- School Mascot: Joe The Conqueror
Frequently Asked Questions
What is Los Altos High School's ranking?
Los Altos High School is ranked #3925 out of 9,523 schools, which ranks it among the top 50% of public schools in California.
What schools are Los Altos High School often compared to?
Los Altos High Schoolis often viewed alongside schools like Glen A. Wilson High School by visitors of our site.
What percent of students have achieved state testing proficiency in math and reading?
18% of students have achieved math proficiency (compared to the 34% CA state average), while 71% of students have achieved reading proficiency (compared to the 47% CA state average).
What is the graduation rate of Los Altos High School?
The graduation rate of Los Altos High School is 97%, which is higher than the California state average of 87%.
How many students attend Los Altos High School?
1,592 students attend Los Altos High School.
What is the racial composition of the student body?
90% of Los Altos High School students are Hispanic, 6% of students are Asian, 3% of students are White, and 1% of students are Two or more races.
What is the student-teacher ratio of Los Altos High School?
Los Altos High School has a student ration of 23:1, which is higher than the California state average of 21:1.
What grades does Los Altos High School offer ?
Los Altos High School offers enrollment in grades 9-12
What school district is Los Altos High School part of?
Los Altos High School is part of Hacienda La Puente Unified School District.
School Reviews
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