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Thornton High School

9351 Washington Street, Thornton, CO 80229

FSchola Grade
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Grades
9–12
High
Students
1,439
Enrolled 2024–25
Students per teacher
16.3 : 1
Full-time teachers
District
Adams 12 Five Star Schools
Adams County

Schola Grade F · Far below average

Letter grade (A–F) · compared with 303 Colorado high schools · How we grade
Test scores19% proficient in math & reading
11thpercentile
Equity15% of low-income students proficient
16thpercentile
Attendance63% chronically absent
8thpercentile
Graduation rate78% graduate in 4 years
12thpercentile
College readinessAt least 40% take AP, IB or dual-enrollment courses
84thpercentile
Class size16.3 students per teacher
54thpercentile

Percentiles compare this school with other Colorado high schools; the line marks the middle. Data: test scores 2021–22, graduation and absenteeism 2022–23 (U.S. Department of Education, EDFacts); coursework 2023–24 (Civil Rights Data Collection); staffing 2024–25 (NCES).

About Thornton High School

Thornton High School is a public high school in Thornton, Colorado, serving grades 9–12. It is part of Adams 12 Five Star Schools. The school is located in a large suburb in Adams County.

In the 2024–25 school year, 1,439 students were enrolled, with about 16.3 students for every full-time teacher. That ratio is larger than the typical Colorado high school (15.6 students per teacher). Its Schola Grade is F (far below average), compared with 303 Colorado high schools.

Grades & enrollment

Students per grade, 2024–25Grades 9–12

Location & nearby schools

9351 Washington Street
Thornton, CO 80229
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School details

Type
Public School · What this means
Level
High
Grades offered
9–12
Enrollment (2024–25)
1,439 students
Students per teacher
16.3 to 1
AP courses offered
3
Charter school
No
Magnet school
No
Locale
Suburb — Large
School district
Adams 12 Five Star Schools
County
Adams County
NCES school ID
080690001192

Schools near Thornton High School

All 41 schools in Thornton →

School data comes from the U.S. Department of Education: the National Center for Education Statistics (NCES) Common Core of Data and EDGE school locations (2024–25) and Private School Survey (2023–24), the Civil Rights Data Collection (2023–24), and EDFacts (test results 2021–22; graduation and chronic absenteeism 2022–23), plus other public sources. Please contact the school to confirm enrollment, programs, and other details. How we source data.