Below Average
#1477 of 1,815 schools in CO
Thornton High School
High School · Adams 12 Five Star Schools
9351 WASHINGTON STREET, Thornton, CO 80229
Enrollment
1,416
Student-Teacher
17.1:1
Score
4.6
Grades
9th – 12th
Enrollment
1,416
Student-Teacher
17.1:1
Score
4.6
Grades
9th – 12th
Data vintage
2022-23
Data vintage2022-23
How this school compares
Colorado schools
#1,477 of 1,815
In Thornton
#28 of 39
public schools
In district
#39 of 53
Adams 12 Five Star Schools
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Thornton High School
High School in Thornton · grades 9th – 12th. Start here, then compare fit against nearby and district options.
Thornton Middle School
0.2 mi away. Use as a geographic alternative in the same move search.
Thornton Elementary School
0.3 mi away. Use as a geographic alternative in the same move search.
About Thornton High School
Thornton High School is a public high school in Thornton, CO, part of Adams 12 Five Star Schools. Thornton High School serves approximately 1,416 students, and covers grades 9th-12th, and has a 17.1:1 student-teacher ratio. Thornton High School has a current MySchoolScout rating of 4.6 out of 10 and ranks #1,477 of 1,815 schools in CO.
Structured state assessment records for Thornton High School show 21% math proficiency (multi-year average, 2009-2022) and 38% reading/ELA proficiency (multi-year average, 2009-2021).
- This school 4.6 · Below Average
- District avg 5.6
- CO avg 6.5
What Parents Should Know
63% of students at Thornton High School were chronically absent in the 2022-23 school year, above the national average. Chronic absenteeism means missing 15 or more school days, and at high rates it drags on classroom pacing for everyone. Ask what the school does to help families get kids to class consistently.
Score Breakdown
Full Profile · 4/4 metricsView breakdown
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Thornton High School — Students at Thornton High School score 20% proficient, which is below what's typical for similar communities (expected: 22%).
Equity & Diversity
Shown separately, not included in overall scoreFree/Reduced Lunch
80.7%
Students qualifying for federal meal assistance
Test Scores CO EDFACTS (2021-22)
Based on 27 test records from CO state assessments. About our data
Proficiency Trend
↓ DecliningAverage proficiency (% at or above grade level) across Math & ELA over time.
* COVID-affected year — test participation was uneven nationwide. This data is weighted at 50% in the Growth score calculation.
Source: EdFacts (NCES) and state assessment data. Growth score: 3.5/10.
How Thornton High School Compares
See how Thornton High School performs across key quality dimensions compared to state benchmarks.
Funding & Resources
Programs & Offerings
Data as of 2021-22 · Source: CRDC via Urban Institute · Learn more
Location
9351 WASHINGTON STREET, Thornton, CO 80229
Nearby Alternatives
Families considering Thornton High School may also want to explore other high schools in the area. Northglenn High School (rated 5.8/10, 1.2 miles away, in nearby Northglenn), which scores notably higher. Another option is Academy High School (rated 5.1/10, 1.3 miles away), which scores slightly higher. Additionally, New America School - Thornton (rated 4.4/10, 0.6 miles away), with a very similar rating. For more schools in Thornton, see our Thornton schools guide .
Nearby Schools
20 within 1.4 mi| School | Distance | Rating |
|---|---|---|
| Thornton Middle School Thornton | 0.2 mi | 4.0 |
| Thornton Elementary School Thornton | 0.3 mi | 5.0 |
| New America School - Thornton Thornton | 0.6 mi | 4.4 |
| North Mor Elementary School Northglenn | 0.6 mi | 5.3 |
| McElwain Elementary School Thornton | 1.1 mi | 4.8 |
| North Star Elementary School Denver | 1.0 mi | 5.2 |
| A CHILD'S TOUCH Thornton | 1.0 mi | — |
| Northglenn High School Northglenn | 1.2 mi | 5.8 |
| Achieve Academy Thornton | 1.1 mi | 3.4 |
| Coronado Hills Elementary School Thornton | 1.4 mi | 4.8 |
| York International Thornton | 1.1 mi | 5.2 |
| The Studio School Northglenn | 1.5 mi | 4.7 |
| Preschool on Poze Thornton | 1.2 mi | 3.9 |
| North Valley School for Young Adults Thornton | 1.3 mi | 3.9 |
| Academy High School Thornton | 1.3 mi | 5.1 |
| Clayton Partnership School Thornton | 1.3 mi | 4.8 |
| Monterey Community School Denver | 1.4 mi | 3.1 |
| STEM Launch Thornton | 1.3 mi | 8.1 |
| The Pinnacle Charter School Federal Heights | 1.5 mi | 4.7 |
| Mapleton Expeditionary School of the Arts Thornton | 1.4 mi | 3.8 |
Neighborhood Census ACS (2019-2023)
Census data for ZIP 80229 (ACS 2019-2023 5-Year Estimates) · Data sources
Median Income
$83,450
Median Home Value
$382,900
Median Rent
$1,719/mo
Population
57,274
College Educated
19.8%
Homeownership
67.7%
Avg Commute
29.5 min
Poverty Rate
9.1%
Median Age
32.6
Similar Schools
Schools in the same state with comparable level, size, and ratings
| School | Rating |
|---|---|
| Alameda International Junior/Senior High School Lakewood, CO | 4.6 |
| VALOR CHRISTIAN HIGH SCHOOL Highlands Ranch, CO | 4.5 |
| Aurora West College Preparatory Academy Aurora, CO | 4.4 |
| Abraham Lincoln High School Denver, CO | 4.8 |
| Central High School Pueblo, CO | 4.9 |
| Fort Morgan High School Fort Morgan, CO | 4.9 |
Frequently Asked Questions
Common questions about Thornton High School
What grades does Thornton High School serve?
Thornton High School serves students in grades 9th through 12th.
How many students attend Thornton High School?
Thornton High School has an enrollment of approximately 1,416 students.
What is the student-teacher ratio at Thornton High School?
The student-teacher ratio at Thornton High School is 17.1:1. A lower ratio generally means more individual attention per student. The national average is approximately 16:1 for public schools.
How does Thornton High School rank in CO?
Thornton High School ranks #1,477 of 1,815 schools in CO.
What is Thornton High School's MySchoolScout rating?
Thornton High School has a current MySchoolScout rating of 4.6 out of 10. This score combines the level-appropriate components shown in the rating breakdown; equity data is shown separately for context.
What are the test scores at Thornton High School?
Based on loaded state assessment records, Thornton High School has 21% math proficiency (multi-year average, 2009-2022) and 38% reading/ELA proficiency (multi-year average, 2009-2021).
Is Thornton High School a charter school?
No, Thornton High School is not a charter school. It is a traditional public school operated by the local school district.
Is Thornton High School a Title I school?
No, Thornton High School is not currently a Title I school.
What does the Free & Reduced Lunch percentage mean for Thornton High School?
80.7% of students at Thornton High School qualify for free or reduced-price lunch. This is a commonly used indicator of economic need and provides important context when interpreting test scores.
Neighborhood Context
Powered by 
Quick Facts NCES CCD (SY 2022-23)
- Grades
- 9th – 12th
- Enrollment
- 1,416
- Student-Teacher Ratio
- 17.1:1
- Teachers (FTE)
- 83
- Free/Reduced Lunch
- 80.7%
- Type
- regular
- Setting
- Large Suburb
- County
- Adams County
- Chronic Absenteeism (SY 2022-23)
- 62.8%
- Phone
- (720) 972-4800
- 4-Year Graduation
- 78.0%
Resources & Links
District
Adams 12 Five Star Schools- District Enrollment
- 34,998
- Schools in District
- 54
- Per-Pupil Spending
- $14,748
- District Rank
- #39 of 53
Other Schools in This District
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