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Schools›Colorado›THORNTON
SCHOOL COMMUNITY·ADAMS 12 FIVE STAR SCHOOLS·NCES 080690001192

Thornton High School

9351 WASHINGTON STREET, THORNTON, CO 80229 · (720) 972-4800 · Adams County
GRADES 09–12HIGH21-SUBURBTITLE IREGULAR SCHOOL1,439 STUDENTS
·
allk12 Grade
Not graded

This school has no state test results for 2023-24 or 2024-25 to grade, which is common for schools that end before third grade. How grades work

Enrollment
1,439
High
DISTRICT 1,250 · STATE 627
Student : Teacher
16.4:1
88 FTE teachers
DISTRICT 19.3:1 · STATE 16.9:1
Free / Reduced Lunch
79%
1,132 students
DISTRICT 57% · STATE 50%
Community
6
0 members
Enrollment and student:teacher ratio compared against other high schools. Free/Reduced Lunch and demographics compared against all schools.

Enrollment by grade, 2024-25

GradeStudentsShare
Grade 936625%
Grade 1037026%
Grade 1136025%
Grade 1234324%
Student demographics
46%Diversity index
The chance that two students picked at random belong to different racial or ethnic groups.
DISTRICT 63% · STATE 62% · US 70%
White
21815%
DISTRICT 39% · STATE 49% · US 43%
Hispanic
1,02671%
DISTRICT 46% · STATE 37% · US 30%
Black
222%
DISTRICT 2% · STATE 5% · US 15%
Asian
13910%
DISTRICT 7% · STATE 3% · US 6%
Two+
232%
DISTRICT 5% · STATE 5% · US 5%
Native American
60%
DISTRICT 0% · STATE 1% · US 1%
Pacific Islander
10%
DISTRICT 0% · STATE 0% · US 0%
Student head counts by race/ethnicity from federal NCES enrollment data. District, state, and US figures are each group's share of all public school students in that area (US excludes territories). Very small groups may be suppressed in the source, so categories do not always sum exactly to total enrollment.
Gender split
Male
78154%
Female
65445%

Discussions

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Schools most like Thornton High School

SchoolStudentsLow-incomeProficient
Thornton High School this school1,43978.7%N/A
John F Kennedy High School
DENVER
68178.9%11.4%
DSST: College View High School
DENVER
53385.7%15.3%
Alameda International Junior/Senior High School
LAKEWOOD
1,00265.4%10.7%
Westminster High School
WESTMINSTER
2,01082.0%11.3%
Aurora West College Preparatory Academy
AURORA
92794.1%5.3%
Matched among Colorado high schools on enrollment, the share of students from low-income families (eligible for free or reduced-price lunch), and racial and ethnic makeup. Proficient is the average share of students meeting the state standard across all of the school's state tests in 2023-24 and 2024-25, the same combined score our test-score rankings use. Online schools and schools serving specialized populations are not matched.

Where Thornton High School ranks

Among high schools
MeasureThis schoolIn ColoradoIn Adams County
Enrollment
ranked largest first
1,439#59 of 409#9 of 29
Students per teacher
ranked fewest first
16.4:1#96 of 250#4 of 21
Diversity index
ranked most diverse first
45.6%#144 of 250#10 of 21
Free and reduced lunch
ranked highest share first
78.7%#49 of 320#8 of 26
Enrollment change since 2017-18
ranked steepest decline first
-15.7%#58 of 139#4 of 13
Ranked against other public high schools. Online schools are left out of every list, and test-score lists leave out schools that serve specialized populations. Each rank links to the full list. Arrows under a test-score rank show places moved since the prior test year, among schools tested both years.

4-year change

SY 2020-21 vs SY 2024-25
Enrollment
1,439
-105 (-7%) vs 2020
+35% since 1990-91, when it was 1,069
Student : Teacher
16.4:1
was 18.6:1
Source: NCES Common Core of Data

Enrollment and staffing by year

School yearStudentsTeachers (FTE)Students per teacherFree and reduced lunch
2024-251,4398816.4:179% (1,132)
2023-241,4168317.1:181% (1,143)
2022-231,41274.518.9:174% (1,045)
2020-211,5448318.6:168% (1,057)
2017-181,70688.919.2:140% (681)
2015-161,7299019.2:141% (701)
2010-111,7629518.6:138% (667)
2000-012,24210521.4:119% (426)
1990-911,0696117.5:1N/A
Source: NCES Common Core of Data. Rows are the federal collections on file for Thornton High School.

Since 2017-18: students down 16% (1,706 to 1,439); teachers down 1% (88.9 to 88).

About Thornton High School

At 9351 WASHINGTON STREET in THORNTON, Colorado, Thornton High School operates as a large high school. It enrolls 1,439 students in 2024-25. The grades offered are 9 through 12. The school is 130% bigger than the average for high schools in Colorado.

Thornton High School is one school in a 54-school district, Adams 12 Five Star Schools, which enrolls 34,466 students.

More than half of the students at Thornton High School are Hispanic (71%). Next come 15% White and 10% Asian. That compares with about 43% Hispanic among all Adams County residents. The diversity index for Thornton High School is 46%. For US public schools as a whole it is 70%.

Thornton High School has 88 full-time-equivalent teachers, for a student-to-teacher ratio of about 16.4:1. The ratio is within a point of the 16.9:1 average for high schools in Colorado. Eligibility for free or reduced-price lunch, often used to gauge student poverty, is 79%. That is higher than the 62% average for public schools in Adams County.

In the surrounding county, Adams County, the median household earns about $94,571 a year, 29% of adults hold a bachelor's degree or higher, and about 7% of residents live below the federal poverty line. Counting Thornton High School, Adams County has 171 public schools.

Thornton High School is about 0.2 miles from Thornton Middle School, its nearest public school. There are at least 8 other public schools within five miles.

The school is in a suburban area outside a principal city, within an urbanized area with a population of 250,000 or more, according to its NCES locale (Suburb: Large).

The 2020-21-to-2024-25 change in enrollment was a 7% decline, from 1,544 to 1,439. The student-to-teacher ratio went down from 18.6:1 to 16.4:1.

The allk12 page for Thornton High School lets the school community talk about pickup and drop-off, after-school programs, and teacher feedback. Current and former families are welcome to add their experience.

Adams County at a glance

View full county profile
Population
530,225
Census ACS
Median income
$94,571
Household, ACS
Bachelor's+
29%
Adults 25+
Poverty rate
7%
Below federal line
Schools in county
171
87,938 students

Quick facts

School name
Thornton High School
District
Adams 12 Five Star Schools
Address
9351 WASHINGTON STREET, THORNTON, CO 80229
Phone
(720) 972-4800
County
Adams County
Level
High
Grade range
09–12
Total enrollment
1,439
Teachers (FTE)
88
Student–teacher ratio
16.4:1
Free and reduced lunch
1,132 (79%)
Locale
21-Suburb: Large
NCES ID
080690001192
Charter school
No
Virtual school
No

Related schools

Other schools in Adams 12 Five Star Schools
Other schools in THORNTON
Other Thornton High schools

One other US public school is named Thornton High. Thornton High School is the largest of the 2.

Nearby schools

Frequently asked questions

About Thornton High School
How many students attend Thornton High School?
Thornton High School enrolls approximately 1,439 students in grades 09-12.
What age range does Thornton High School serve?
Thornton High School serves students from grade 09 through grade 12.
How many teachers does Thornton High School have?
Thornton High School employs 88 FTE teachers, for a student-to-teacher ratio of 16.4:1.
What is the student diversity at Thornton High School?
Student demographics at Thornton High School are roughly 15% White, 71% Hispanic, 2% Black, 10% Asian, 2% Two or more.
What district is Thornton High School in?
Thornton High School is part of Adams 12 Five Star Schools.
Data sourceSchool profile facts are sourced from the NCES. Community content is posted by allk12 members.
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