Best high schools in Thornton (2025)
Schools classified as high schools by NCES. Ranked by the Success Index (US) from official American data; 5 schools in Thornton, Colorado. Rank positions shown on each profile are within United States and Colorado.
- 147Riverdale Ridge High SchoolThornton · Public High39.2% Free/reduced-price lunch · 1,784 students
- 222Academy High SchoolThornton · Public High17% Math proficiency · 399 students
- 319Mapleton Expeditionary School of the ArtsThornton · Public High12% Math proficiency · 393 students
- 418Thornton High SchoolThornton · Public High12% Math proficiency · 1,439 students
- 518Mapleton Early Career PreparationThornton · Public High12% Math proficiency · 306 students
| # | School | Sector | Success Index (US) | Key result | Students |
|---|---|---|---|---|---|
| 1 | Riverdale Ridge High School Thornton · High · Grades 9–12 | Public | 46.6 Lower 50% | 39.2% Free/reduced-price lunch | 1,784 |
| 2 | Academy High School Thornton · High · Grades 9–12 | Public | 22.3 Lower 50% | 17% Math proficiency | 399 |
| 3 | Mapleton Expeditionary School of the Arts Thornton · High · Grades 9–12 | Public | 18.9 Lower 50% | 12% Math proficiency | 393 |
| 4 | Thornton High School Thornton · High · Grades 9–12 | Public | 18.1 Lower 50% | 12% Math proficiency | 1,439 |
| 5 | Mapleton Early Career Preparation Thornton · High · Grades 9–12 | Public | 17.6 Lower 50% | 12% Math proficiency | 306 |
Riverdale Ridge High School in Thornton leads the 2025 list of high schools in Thornton with a Success Index (US) of 46.6. Of the 5 schools shown, 5 are public.
For the full picture see the wider Colorado high schools rankings, every school on the Thornton page, or the comparison tool to put a shortlist side by side.
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Frequently asked questions
What is the best high school in Thornton?
Riverdale Ridge High School in Thornton, Colorado ranks first among high schools in Thornton with a Success Index (US) of 46.6 out of 100 (Enrollment: 1,784).
How are high schools in Thornton ranked?
Each school's Success Index (US) combines 4 factors: math proficiency (30%), reading proficiency (30%), community advantage (fewer free/reduced-price lunch) (25%), students per teacher (15%). Each factor is a percentile against schools of the same type across United States. Schools with fewer than 60 students are excluded from rankings.
Are these 2025 rankings official?
No. They are computed by Success Tutoring from official American data (Urban Institute Education Data Portal (NCES CCD, EDFacts); NCES Common Core of Data). States set their own assessments and proficiency cut scores, so proficiency rates are most comparable within a state. Use the state rankings for like-for-like comparisons.