Thornton High School
🇺🇸 Official data · 2025Thornton, Colorado 80229 · Adams 12 Five Star Schools
#291 of 307 high schools in Colorado
#15599 of 16,910 nationally
About Thornton High School
Thornton High School is a public high located in Thornton, in the Adams 12 Five Star Schools school district of Colorado, United States. It caters for Grades 9–12. In 2025 it enrolled 1,439 students. Traditional public schools run by a school district; free to attend.
Its Success Index (US) is 18.1 out of 100, placing it in the lower 50% of high schools in United States and 291st of 307 ranked high schools in Colorado. Its strongest component is students per teacher (38th percentile), and its weakest is math proficiency (9th percentile).
Other published figures: enrollment 1,439.
There are 36 schools in Thornton; Thornton High School ranks 24th of 31 scored schools there.
Success Index (US) breakdown
Each component is a percentile against high schools across United States.
- Math proficiency (30%)12%
- Reading proficiency (30%)27%
- Community advantage (fewer free/reduced-price lunch) (25%)78.7%
- Students per teacher (15%)16.4
The Success Index (US) summarises published data about a school community. It is not a measure of teaching quality. Read the methodology.
Published measures
All figures published for Thornton High School by the official sources.
- Enrollment
- 1,439
- Students enrolled in the latest NCES directory year.
- Free/reduced-price lunch
- 78.7%
- Share of students eligible for free or reduced-price lunch.
- Students per teacher
- 16.4
- Enrollment divided by FTE teachers; not class size.
- Reading proficiency
- 27%
- Share of tested students proficient or above (all students, all grades).
- Math proficiency
- 12%
- Share of tested students proficient or above (all students, all grades).
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Schools near Thornton High School
Closest schools by straight-line distance, with their Success Index (US).
Thornton Middle School
Thornton · Public middle · Grades 6–8
721 students · 284 m away
Thornton Elementary School
Thornton · Public elementary · Grades PK–5
387 students · 517 m away
North Mor Elementary School
Northglenn · Public elementary · Grades PK–5
304 students · 1.0 km away
North Star Elementary School
Denver · Public elementary · Grades PK–5
320 students · 1.7 km away
Achieve Academy
Thornton · Public elementary · Grades PK–8
370 students · 1.7 km away
McElwain Elementary School
Thornton · Public elementary · Grades K–5
361 students · 1.8 km away
York International
Thornton · Public other · Grades K–12
776 students · 1.8 km away
Northglenn High School
Northglenn · Public high · Grades 9–12
1,844 students · 1.9 km away
Preschool on Poze
Thornton · Public other · Grades PK–PK
193 students · 1.9 km away
STEM Launch
Thornton · Public elementary · Grades K–8
677 students · 2.1 km away
Similar schools
Public high schools in Colorado with a comparable Enrollment.
Monarch High School
Louisville · Public high · Grades 9–12
1,431 students
Fruita Monument High School
Fruita · Public high · Grades 9–12
1,427 students
Sand Creek High School
Colorado Springs · Public high · Grades 9–12
1,426 students
Timnath Middle-High School
Timnath · Public high · Grades 6–12
1,456 students
Poudre High School
Fort Collins · Public high · Grades 9–12
1,409 students
Golden High School
Golden · Public high · Grades 9–12
1,469 students
Frequently asked questions
Is Thornton High School a good school?
Thornton High School has a Success Index (US) of 18.1 out of 100 (Lower 50% of high schools in United States) and ranks #291 of 307 in Colorado. The index summarises published data about the school community and, where available, attainment; it does not measure teaching quality, so visit the school and ask about support at your child's level.
Where does Thornton High School rank in Colorado?
Thornton High School ranks #291 of 307 high schools in Colorado and #15599 of 16,910 nationally on the Success Index (US) (2025 data).
How many students attend Thornton High School?
Thornton High School had 1,439 students in 2025.
Is Thornton High School a elementary school or a high school?
Thornton High School is classified as a high covering Grades 9–12. It is a public school.
What other schools are near Thornton High School?
There are 10 schools within 15 km of Thornton High School; they are listed on this page with their Success Index (US) and distance, and can be compared side by side.