Horizon High School is a public secondary institution located in Thornton, Colorado.
Serving 1,966 students in grades 9-12, Horizon High School ranks in the top 20% of all schools in Colorado for overall test scores (math proficiency is top 30%, and reading proficiency is top 30%).
The percentage of students achieving proficiency in math is 49% (which is higher than the Colorado state average of 33%). The percentage of students achieving proficiency in reading/language arts is 62% (which is higher than the Colorado state average of 45%).
The student-teacher ratio of 20:1 is higher than the Colorado state level of 15:1.
Minority enrollment is 47% of the student body (majority Hispanic), which is lower than the Colorado state average of 51% (majority Hispanic).
Quick Facts (2026)
- Grades: 9-12
- Enrollment: 1,966 students
- Student-Teacher Ratio: 20:1
- Minority Enrollment: 47%
- Graduation Rate: 96% (Top 5% in CO)
- Overall Testing Rank: Top 20%
- Math Proficiency: 49% (Top 30%)
- Reading Proficiency: 62% (Top 20%)
- Science Proficiency: 29% (Top 50%)
- Source: National Center for Education Statistics (NCES), CO Dept. of Education
Top Rankings
Horizon High School ranks among the top 20% of public schools in Colorado for:
Category
Attribute
Overall Rank
Reading/Language Arts Proficiency
Graduation Rate
School Overview
Horizon High School's student population of 1,966 students has stayed relatively flat over five school years.
The teacher population of 98 teachers has stayed relatively flat over five school years.
Grades Offered
Grades 9-12
(No virtual instruction)
(No virtual instruction)
Total Students
1,966 students
Total Classroom Teachers
98 teachers
Year Founded
1988
Colors
Maroon, Silver
School Calendar
School Rankings
Horizon High School ranks within the top 20% of all 1,748 schools in Colorado (based off of combined math and reading proficiency testing data).
The diversity score of Horizon High School is 0.60, 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
#318 out of 1748 schools
(Top 20%)
(Top 20%)
Math Test Scores (% Proficient)
49%
33%
Reading/Language Arts Test Scores (% Proficient)
62%
45%
Science Test Scores (% Proficient)
(20-21)29%
29%
Student-Teacher Ratio
20:1
15:1
American Indian
1%
1%
Asian
5%
3%
Hispanic
35%
37%
Black
1%
5%
White
53%
49%
Two or more races
5%
5%
All Ethnic Groups
Graduation Rate
96%
82%
Chronically Absent Students
(22-23)26.2%
33.6%
Eligible for Free Lunch
27%
39%
Eligible for Reduced Lunch
6%
5%
School Statewide Testing
School District Name
Source: National Center for Education Statistics (NCES), CO Dept. of Education
School Notes
- School Mascot: Hawk
Frequently Asked Questions
What is Horizon High School's ranking?
Horizon High School is ranked #318 out of 1,748 schools, which ranks it among the top 20% of public schools in Colorado.
What schools are Horizon High School often compared to?
Horizon High Schoolis often viewed alongside schools like Mountain Range High School by visitors of our site.
What percent of students have achieved state testing proficiency in math and reading?
49% of students have achieved math proficiency (compared to the 33% CO state average), while 62% of students have achieved reading proficiency (compared to the 45% CO state average).
What is the graduation rate of Horizon High School?
The graduation rate of Horizon High School is 96%, which is higher than the Colorado state average of 82%.
How many students attend Horizon High School?
1,966 students attend Horizon High School.
What is the racial composition of the student body?
53% of Horizon High School students are White, 35% of students are Hispanic, 5% of students are Asian, 5% of students are Two or more races, 1% of students are American Indian, and 1% of students are Black.
What is the student-teacher ratio of Horizon High School?
Horizon High School has a student ration of 20:1, which is higher than the Colorado state average of 15:1.
What grades does Horizon High School offer ?
Horizon High School offers enrollment in grades 9-12 (No virtual instruction).
What school district is Horizon High School part of?
Horizon High School is part of Adams 12 Five Star Schools.
School Reviews
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