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High · Regular · Grades 9 to 12

Riverdale Ridge High School, Thornton, CO

CEP schoolRiverdale Ridge High School is a public high school in Thornton, part of School District 27J. It enrolled 1,784 students in 2024-25, with 21.8 students per full-time teacher.

Enrollment and teachers

Students
1,784
Teachers (FTE)
82.0
Students per teacher
21.8
Grades
9 to 12

This school's ratio is 2.3 higher than the district figure of 19.5. The Colorado average across schools is 16.7. Ratios count all teachers, including specialists, so they are lower than typical class sizes.

This school21.8
District19.5
Colorado16.7
United States15.3

School details

Address
13380 Yosemite Street, Thornton, CO 80602
Phone
(303)655-6800
District
School District 27J
County
Adams County
Level
High
Type
Regular
Status
Open
Charter
No
Virtual
No
Locale
Suburb: Large
NCES school ID
080258006738
Location from NCES coordinates. Map data OpenStreetMap contributors. Open larger map

School meals

Counts of students eligible for free or reduced-price lunch, as reported to NCES.
Free lunch
580
Reduced-price lunch
120
Free or reduced-price lunch
70039.2% of enrollment.
Community Eligibility Provision
Yes (CEP school)

Schools in the Community Eligibility Provision (CEP) serve free meals to all students, so their free lunch counts often reflect direct certification or total enrollment. Free and reduced lunch shares are not comparable between CEP and non-CEP schools.

Related schools

Other high schools in School District 27J

High schools elsewhere in Thornton

We publish official enrollment and staffing data, not ratings or test scores.

Source: NCES Common Core of Data 2024-25 and F-33 finance 2020, via the Urban Institute Education Data Portal. Last reviewed October 2026. Blank values are not available, not applicable or suppressed in the source. See the methodology.