1
Enrollment
1,966
High
DISTRICT 1,250 · STATE 627
SCHOOL COMMUNITY·ADAMS 12 FIVE STAR SCHOOLS·NCES 080690001491
Horizon High School
5321 EAST 136TH AVENUE, BRIGHTON, CO 80601 · (720) 972-4400 · Adams County
GRADES 09–12HIGH21-SUBURBREGULAR SCHOOL1,966 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
Student : Teacher
20.1:1
98 FTE teachers
DISTRICT 19.3:1 · STATE 16.9:1
Free / Reduced Lunch
33%
651 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
| Grade | Students | Share |
|---|---|---|
| Grade 9 | 465 | 24% |
| Grade 10 | 505 | 26% |
| Grade 11 | 524 | 27% |
| Grade 12 | 472 | 24% |
Student demographics
59%Diversity index
The chance that two students picked at random belong to different racial or ethnic groups.
DISTRICT 63% · STATE 62% · US 70%
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
BeatsExpectations
Demographically-adjusted score · methodologyTier
UNDERPERFORMING
Bottom 10% of CO schools after controlling for student poverty
Actual proficiency
32.3%
composite math + reading, all grades
Predicted
46.6%
based on CO schools with similar FRL share
Beats by
-14.3pp
below demographic expectation
What this means: About 32% of students here test proficient in math and reading, below the roughly 47% typical for Colorado schools with a similar share of low-income students. BeatsExpectations compares each school with others at the same poverty level, not by raw scores, so a school lands here when its results trail those comparable schools, which is not the same as having low scores. A higher-scoring school can still fall in this tier if similar schools score higher still.
BeatsExpectations runs a per-state regression of proficiency on free/reduced-lunch share, then scores each school by residual. How this is calculated →
Schools most like Horizon High School
Horizon High School's state test result (32.3% proficient) is higher than 2 of the 5 schools below with a result.
| School | Students | Low-income | Proficient |
|---|---|---|---|
| Horizon High School this school | 1,966 | 33.1% | 32.3% |
| Lakewood High School LAKEWOOD | 1,735 | 36.8% | 35.5% |
| Standley Lake High School WESTMINSTER | 1,123 | 32.7% | 30.4% |
| Rampart High School COLORADO SPRINGS | 1,305 | 31.4% | 44.7% |
| Riverdale Ridge High School THORNTON | 1,784 | 39.2% | 14.1% |
| Niwot High School NIWOT | 1,509 | 25.6% | 51.0% |
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 Horizon High School ranks
Among high schools| Measure | This school | In Colorado | In Adams County |
|---|---|---|---|
| State test proficiency ranked highest first | 32.3% | #96 of 231 | #2 of 15 |
| Enrollment ranked largest first | 1,966 | #19 of 409 | #2 of 29 |
| Students per teacher ranked fewest first | 20.1:1 | #189 of 250 | #13 of 21 |
| Diversity index ranked most diverse first | 59.0% | #43 of 250 | #4 of 21 |
| Free and reduced lunch ranked highest share first | 33.1% | #229 of 320 | #24 of 26 |
| Enrollment change since 2017-18 ranked steepest decline first | -3.5% | #123 of 139 | #12 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 2024-25Enrollment
1,966
-101 (-5%) vs 2020
+38% since 1990-91, when it was 1,427
Student : Teacher
20.1:1
was 20.7:1
Source: NCES Common Core of Data
Enrollment and staffing by year
| School year | Students | Teachers (FTE) | Students per teacher | Free and reduced lunch |
|---|---|---|---|---|
| 2024-25 | 1,966 | 97.6 | 20.1:1 | 33% (651) |
| 2023-24 | 1,981 | 100.2 | 19.8:1 | 31% (622) |
| 2022-23 | 2,026 | 98.7 | 20.5:1 | 26% (533) |
| 2020-21 | 2,067 | 100 | 20.7:1 | 20% (407) |
| 2017-18 | 2,037 | 93.6 | 21.8:1 | 22% (444) |
| 2015-16 | 2,025 | 94 | 21.5:1 | 22% (452) |
| 2010-11 | 1,813 | 91 | 19.9:1 | 10% (179) |
| 2000-01 | 2,206 | 107 | 20.6:1 | 7% (144) |
| 1990-91 | 1,427 | 72 | 19.8:1 | N/A |
Source: NCES Common Core of Data. Rows are the federal collections on file for Horizon High School.
Since 2017-18: students down 3% (2,037 to 1,966); teachers up 4% (93.6 to 97.6).
About Horizon High School
Horizon High School is a public high school run by Adams 12 Five Star Schools in BRIGHTON, Colorado. The latest federal count shows 1,966 students in grades 9 through 12. Against the 627-student average for high schools in Colorado, enrollment here is 214% higher.
Adams 12 Five Star Schools has 34,466 students in 54 schools, and Horizon High School is one of those schools.
At Horizon High School, White students make up 53% of the student body. After that, the student body is 35% Hispanic, 5% multiracial, and 5% Asian. For comparison, Adams County is about 55% White. The school's diversity index is 59%, meaning two students picked at random have a 59% chance of belonging to different racial or ethnic groups.
Dividing enrollment by its 97.6 full-time-equivalent teachers gives a ratio of about 20.1:1. That is 3.2 students per teacher above the 16.9:1 average for high schools in Colorado. Horizon High School reports 33% of students eligible for free or reduced-price meals. Public schools in Adams County average 62%.
When test results are adjusted for free or reduced-price lunch eligibility, Horizon High School ranks in the bottom 10% of Colorado schools. It scores 32.3%; the prediction is 46.6%.
Adams County has these Census figures: the median household income is $94,571, the share of adults with a bachelor's degree or higher is 29%, and about 7% of people live in poverty. In all, Adams County has 171 public schools and roughly 87,938 students.
The closest public school, Bright Horizons Preschool, is less than a tenth of a mile from Horizon High School. There are at least 8 other public schools within five miles. By average proficiency, Horizon High School is 7th among 8 schools close by.
Horizon High School has an NCES locale of Suburb: Large.
Horizon High School's enrollment declined from 2,067 in 2020-21 to 1,966 in 2024-25.
Discussion on this page can cover school events, clubs, and volunteer needs. Posting is open to anyone connected to the school.
Adams County at a glance
View full county profilePopulation
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
Related schools
Other schools in Adams 12 Five Star Schools
- Legacy High SchoolHigh · 2,052 students
- Northglenn High SchoolHigh · 1,844 students
- Mountain Range High SchoolHigh · 1,788 students
- Stargate Charter SchoolCombined · 1,572 students
- Prospect Ridge AcademyCombined · 1,478 students
- Thornton High SchoolHigh · 1,439 students
Other schools in BRIGHTON
- Brighton High SchoolHigh · 1,733 students
- Bromley East Charter SchoolElementary · 1,214 students
- Foundations AcademyElementary · 763 students
- Elaine S. Padilla Elementary SchoolElementary · 672 students
- Eagle Ridge AcademyHigh · 593 students
- Mary E Pennock Elementary SchoolElementary · 592 students
Other Horizon High schools
5 other US public schools in 6 states are named Horizon High. Horizon High School is the 2nd largest of the 6.
- HORIZON HIGH SCHOOLWINTER GARDEN, FL · 2,685 students
- Horizon High SchoolSCOTTSDALE, AZ · 1,767 students
- Horizon High SchoolEL PASO, TX · 1,469 students
- Horizon High SchoolHAMTRAMCK, MI · 125 students
- Horizon HighRiverdale, CA · 7 students
Nearby schools
- Bright Horizons Preschool0.0 mi · 36
- Eagleview Elementary School0.6 mi · 451
- Prairie Hills Elementary School1.0 mi · 378
- West Ridge Elementary1.0 mi · 690
- Tarver Elementary School1.2 mi · 475
- Discovery Magnet School1.3 mi · 692
Frequently asked questions
About Horizon High SchoolHow many students attend Horizon High School?
Horizon High School enrolls approximately 1,966 students in grades 09-12.
Is Horizon High School an elementary, middle, or high school?
Horizon High School is a high school covering grades 09-12.
How many teachers does Horizon High School have?
Horizon High School employs 98 FTE teachers, for a student-to-teacher ratio of 20.1:1.
What is the student diversity at Horizon High School?
Student demographics at Horizon High School are roughly 53% White, 35% Hispanic, 1% Black, 5% Asian, 5% Two or more.
What district is Horizon High School in?
Horizon 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.