Below Average
#1477 of 1,815 schools in CO
Thornton High School
High School · Adams 12 Five Star Schools · Thornton, CO
An Adams 12 Five Star Schools high school serving grades 9th – 12th.
9351 WASHINGTON STREET, Thornton, CO 80229
- Math 11% proficient (2022)
- Reading 28% proficient (2021)
- 78.0% 4-year graduation
Academics
Full Profile · 4/4 metricsView breakdown
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Students at Thornton High School score 20% proficient, which is below what's typical for similar communities (expected: 22%).
2022 EdFacts proficiency
Most recent published year. School vs. CO average.
Trend
↓ DecliningProficiency has fallen 9 points since 2019, to 11% in 2022, across a 14-year record (2009–2022).
Show all 14 years
Multi-year averages used by the rating model: math 21% (multi-year average, 2009-2022) · reading/ELA 38% (multi-year average, 2009-2021)
* COVID-affected year — test participation was uneven nationwide. This data is weighted at 50% in the Growth score calculation.
Based on 27 test records from CO state assessments and EdFacts (NCES).
Equity & diversity
Shown separately, not included in the overall scoreFree/reduced lunch
80.7%
Students qualifying for federal meal assistance
How we rate schools
A clear 1–10 score built from public data — growth, academics, and learning environment. No hidden criteria, no pay-to-play.
See how we rateThe neighborhood
Where Thornton High School sits, and what the surrounding area looks like.
Nearby same-level schools are colored by their score. Pins are locations, not attendance boundaries. Open the Denver map →
Getting around & local context
- Walk 44Car-Dependent
- Transit 30Some Transit
- Bike 32Somewhat Bikeable
- City Safety: High3,129/100K
Powered by
FBI Uniform Crime Reporting · 2024 · city context (Thornton), not school-level safety or attendance eligibility. Source details
Source period: 2024. Freshness not available.
Area profileU.S. Census ACS 5-year estimates (ACS 2019–2023 5-year estimates)
Median income
$83,450
Median home value
$382,900
Median rent
$1,719/mo
College educated
19.8%
Homeownership
67.7%
Poverty rate
9.1%
ACS 2019–2023 5-year estimates for the ZCTA associated with school ZIP 80229; this is area context, not an attendance boundary.
Programs & students
Programs & Offerings
Compare nearby
Nearby same-level schools
4 from a 5-mile search; district fallback available
| School | Score | Grades | Distance | Enrollment | Compare |
|---|---|---|---|---|---|
| New America School - ThorntonCharter · enrollment unverified | 4.4 | 9–12 | 0.6 mi | 238 | Compare → |
| York InternationalEnrollment path unverified | 5.2 | K–12 | 1.1 mi | 767 | Compare → |
| Northglenn High SchoolEnrollment path unverified | 5.8 | 9–12 | 1.2 mi | 1,834 | Compare → |
| Academy High SchoolEnrollment path unverified | 5.1 | 9–12 | 1.3 mi | 415 | Compare → |
Distance is proximity only; it is not attendance eligibility.
Charter · enrollment unverified: Potential charter option; enrollment requirements have not been verified.
Enrollment path unverified: Potential public school; its attendance or application path has not been classified.
Adams 12 Five Star Schools
- Schools in district
- 54
- Rank in district
- #39 of 53
- District spending per student
- $14,748NCES F-33 · FY 2023 · This annual source is three years behind the current year.
- District child poverty rate
- 8.8%Census SAIPE · 2024
Thornton High School is listed in Adams 12 Five Star Schools; a district label does not verify attendance for an address.
About Thornton High School
Thornton High School is a public high school in Thornton, CO, part of Adams 12 Five Star Schools, serving approximately 1,416 students in grades 9th-12th with a 17.1:1 student-teacher ratio. It holds a MySchoolScout rating of 4.6 out of 10 and ranks #1,477 of 1,815 schools in CO. State assessment records show 21% math proficiency (multi-year average, 2009-2022) and 38% reading/ELA proficiency (multi-year average, 2009-2021).
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.
School factsNCES Common Core of Data (CCD) (SY 2023–24)
- Grades
- 9th – 12th
- Enrollment
- 1,416
- Student-Teacher Ratio
- 17.1:1
- Teachers (FTE)
- 83
- Type
- regular
- Setting
- Large Suburb
- County
- Adams County
- Chronic Absenteeism (SY 2022-23)
- 62.8%
- Phone
- (720) 972-4800
- 4-Year Graduation
- 78.0%
- Area population (ZIP 80229)
- 57,274
- Area average commute
- 29.5 min
- Area median age
- 32.6
Official sources & links
About this school's data
Every number on this page comes from a published source with a stated period. Where a source is partial, aging, or describes a surrounding area rather than the school, that limitation is named below.
- School directory (enrollment, grades, staff, contact)
- NCES Common Core of Data (CCD) · SY 2023–24 · Medium confidence
- Source period: SY 2023–24. A newer release may be available.
- MySchoolScout rating and rank
- MySchoolScout ranking model · Low confidence
- Vintage not available. Do not use this measure alone.
- Derived as a weighted blend of the component scores shown in Academics from state assessment, EdFacts growth, and NCES resource records.
- Math proficiency
- State department of education · 2022 EdFacts · Low confidence
- Older source: 2022 EdFacts. Use as historical context.
- Available for part of the eligible units; results may not represent the full area.
- Derived from source records rather than read directly from one field.
- Reading/ELA proficiency
- State department of education · 2021 EdFacts · Low confidence
- Older source: 2021 EdFacts. Use as historical context.
- Available for part of the eligible units; results may not represent the full area.
- Derived from source records rather than read directly from one field.
- Student progress (growth)
- NCES EdFacts · Mixed source periods · Low confidence
- Vintage not available. Do not use this measure alone.
- Available for part of the eligible units; results may not represent the full area.
- Derived as the fitted year-over-year slope of proficiency from multi-year assessment records.
- Neighborhood (income, housing, education)
- U.S. Census ACS 5-year estimates · ACS 2019–2023 5-year estimates · Low confidence
- Older source: ACS 2019–2023 5-year estimates. Use as historical context.
- Reported for the ZCTA for ZIP 80229; this does not measure the attendance area.
- Programs (AP/IB, athletics, gifted)
- CRDC via Urban Institute · SY 2021–22 · Medium confidence
- Available for part of the eligible units; results may not represent the full area.
- Source period: SY 2021–22. A newer release may be available.
Evidence periods: Rating mixed/unknown input periods; assessments multi-year average, 2009-2022, multi-year average, 2009-2021; directory SY 2023–24
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