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High · Regular · Grades 9 to 12

Centennial High School, Boise, ID

Centennial High School is a public high school in Boise, part of Joint School District No. 2. It enrolled 1,743 students in 2024-25, with 20.5 students per full-time teacher.Listed in NCES data as "CENTENNIAL HIGH SCHOOL".

Enrollment and teachers

Students
1,743
Teachers (FTE)
85.0
Students per teacher
20.5
Grades
9 to 12

This school's ratio is 2.1 higher than the district figure of 18.4. The Idaho average across schools is 18.3. Ratios count all teachers, including specialists, so they are lower than typical class sizes.

This school20.5
District18.4
Idaho18.3
United States15.3

School details

Address
12400 West McMillan Road, Boise, ID 83713
Phone
(208)855-4250
District
Joint School District No. 2
County
Ada County
Level
High
Type
Regular
Status
Open
Charter
No
Locale
City: Midsize
NCES school ID
160210000674
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
441
Reduced-price lunch
89
Free or reduced-price lunch
53030.4% of enrollment.
Direct certification
418Students certified through programs such as SNAP, without an application.

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 Joint School District No. 2

High schools elsewhere in Boise

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.