Union Mine High School is a public high school located in El Dorado, California, United States. It is a member of the El Dorado Union High School District. The school district purchased the property on which the school is located in 1971 for $65,000 to accommodate future growth, but did not need it for many years.
Serving 1,033 students in grades 9-12, Union Mine High School ranks in the top 50% of all schools in California for overall test scores (math proficiency is top 50%, and reading proficiency is top 50%).
The percentage of students achieving proficiency in math is 29% (which is lower than the California state average of 34%). The percentage of students achieving proficiency in reading/language arts is 67% (which is higher than the California state average of 47%).
The student-teacher ratio of 21:1 is equal to the California state level of 21:1.
Minority enrollment is 34% 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: 1,033 students
- Student-Teacher Ratio: 21:1
- Minority Enrollment: 34%
- Graduation Rate: 96% (Top 10% in CA)
- Overall Testing Rank: Top 50%
- Math Proficiency: 29% (Top 50%)
- Reading Proficiency: 67% (Top 20%)
- Science Proficiency: 39% (Top 30%)
- Source: National Center for Education Statistics (NCES), CA Dept. of Education
Top Rankings
Union Mine High School ranks among the top 20% of public schools in California for:
Category
Attribute
Reading/Language Arts Proficiency
Graduation Rate
School Overview
Union Mine High School's student population of 1,033 students has declined by 8% over five school years.
The teacher population of 49 teachers has stayed relatively flat over five school years.
Grades Offered
Grades 9-12
Total Students
1,033 students
Total Classroom Teachers
49 teachers
Year Founded
1999
Colors
Navy Blue, Burgundy
School Calendar
School Motto
Home of the Diamondbacks
School Rankings
Union Mine 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 Union Mine High School is 0.50, 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
#3002 out of 9523 schools
(Top 50%)
(Top 50%)
Math Test Scores (% Proficient)
29%
34%
Reading/Language Arts Test Scores (% Proficient)
67%
47%
Science Test Scores (% Proficient)
39%
29%
Student-Teacher Ratio
21:1
21:1
American Indian
1%
1%
Asian
1%
12%
Hispanic
25%
56%
Black
1%
5%
White
66%
20%
Hawaiian
n/a
n/a
Two or more races
6%
6%
All Ethnic Groups
Graduation Rate
96%
87%
Eligible for Free Lunch
37%
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 Union Mine High School's ranking?
Union Mine High School is ranked #3002 out of 9,523 schools, which ranks it among the top 50% of public schools in California.
What schools are Union Mine High School often compared to?
Union Mine High Schoolis often viewed alongside schools like Ponderosa High School, Oak Ridge High School by visitors of our site.
What percent of students have achieved state testing proficiency in math and reading?
29% of students have achieved math proficiency (compared to the 34% CA state average), while 67% of students have achieved reading proficiency (compared to the 47% CA state average).
What is the graduation rate of Union Mine High School?
The graduation rate of Union Mine High School is 96%, which is higher than the California state average of 87%.
How many students attend Union Mine High School?
1,033 students attend Union Mine High School.
What is the racial composition of the student body?
66% of Union Mine High School students are White, 25% of students are Hispanic, 6% of students are Two or more races, 1% of students are American Indian, 1% of students are Asian, and 1% of students are Black.
What is the student-teacher ratio of Union Mine High School?
Union Mine High School has a student ration of 21:1, which is equal to the California state average of 21:1.
What grades does Union Mine High School offer ?
Union Mine High School offers enrollment in grades 9-12
What school district is Union Mine High School part of?
Union Mine High School is part of El Dorado Union High School District.
School Reviews
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