Del Oro High School is in Loomis, California, and a part of the Placer Union High School District. The school opened for the instruction of freshmen and sophomores on September 28, 1959, one week after Colfax opened. It was founded in 1958 and has over 1600 students.
Serving 1,634 students in grades 9-12, Del Oro High School ranks in the top 10% 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 63% (which is higher than the California state average of 34%). The percentage of students achieving proficiency in reading/language arts is 86% (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 26% 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: 1,634 students
- Student-Teacher Ratio: 24:1
- Minority Enrollment: 26%
- Graduation Rate: ≥99% (Top 1% in CA)
- Overall Testing Rank: Top 10%
- Math Proficiency: 63% (Top 20%)
- Reading Proficiency: 86% (Top 5%)
- Science Proficiency: 50% (Top 20%)
- Source: National Center for Education Statistics (NCES), CA Dept. of Education
Top Rankings
Del Oro 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
School Overview
Del Oro High School's student population of 1,634 students has declined by 5% over five school years.
The teacher population of 67 teachers has stayed relatively flat over five school years.
Grades Offered
Grades 9-12
Total Students
1,634 students
Total Classroom Teachers
67 teachers
Year Founded
1958
Colors
Gold, Black
School Calendar
School Rankings
Del Oro High School ranks within the top 10% of all 9,523 schools in California (based off of combined math and reading proficiency testing data).
The diversity score of Del Oro High School is 0.43, 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
#569 out of 9523 schools
(Top 10%)
(Top 10%)
Math Test Scores (% Proficient)
63%
34%
Reading/Language Arts Test Scores (% Proficient)
86%
47%
Science Test Scores (% Proficient)
50%
29%
Student-Teacher Ratio
24:1
21:1
American Indian
1%
1%
Asian
3%
12%
Hispanic
13%
56%
Black
n/a
5%
White
74%
20%
Hawaiian
n/a
n/a
Two or more races
9%
6%
All Ethnic Groups
Graduation Rate
≥99%
87%
Eligible for Free Lunch
13%
54%
Eligible for Reduced Lunch (22-23)
1%
8%
School Statewide Testing
School District Name
Placer Union High School District
Source: National Center for Education Statistics (NCES), CA Dept. of Education
School Notes
- School Mascot: Golden Eagle
Frequently Asked Questions
What is Del Oro High School's ranking?
Del Oro High School is ranked #569 out of 9,523 schools, which ranks it among the top 10% of public schools in California.
What schools are Del Oro High School often compared to?
Del Oro High Schoolis often viewed alongside schools like Granite Bay High School by visitors of our site.
What percent of students have achieved state testing proficiency in math and reading?
63% of students have achieved math proficiency (compared to the 34% CA state average), while 86% of students have achieved reading proficiency (compared to the 47% CA state average).
What is the graduation rate of Del Oro High School?
The graduation rate of Del Oro High School is 99%, which is higher than the California state average of 87%.
How many students attend Del Oro High School?
1,634 students attend Del Oro High School.
What is the racial composition of the student body?
74% of Del Oro High School students are White, 13% of students are Hispanic, 9% of students are Two or more races, 3% of students are Asian, and 1% of students are American Indian.
What is the student-teacher ratio of Del Oro High School?
Del Oro High School has a student ration of 24:1, which is higher than the California state average of 21:1.
What grades does Del Oro High School offer ?
Del Oro High School offers enrollment in grades 9-12
What school district is Del Oro High School part of?
Del Oro High School is part of Placer Union High School District.
School Reviews
5 10/10/2025
The academic programs are great. The teachers are all amazing and treat each student as an individual learner. The extracurricular activities are fantastic, the instructors really pysh their students to their best ability. Facilities are awesome. Parent involvement is HUGE. parents are a big part of the school and what make del oro such a great school. Go DO!
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