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Alumni: what's one memory from CENTENNIAL HIGH SCHOOL that still sticks with you?
Community prompt from u/allk12. Replies below.
Enrollment
1,743
High
DISTRICT 961 · STATE 455
SCHOOL COMMUNITY·JOINT SCHOOL DISTRICT NO. 2·NCES 160210000674
CENTENNIAL HIGH SCHOOL
12400 WEST MCMILLAN ROAD, BOISE, ID 83713 · (208) 855-4250 · Ada County
GRADES 09–12HIGH12-CITYREGULAR SCHOOL1,743 STUDENTS
Student : Teacher
20.3:1
86 FTE teachers
DISTRICT 18.0:1 · STATE 16.0:1
Free / Reduced Lunch
30%
530 students
DISTRICT 33% · STATE 46%
Community
1
0 members
Enrollment and student:teacher ratio compared against other high schools. Free/Reduced Lunch and demographics compared against all schools.
Enrollment by grade
Student demographics
Student head counts by race/ethnicity from federal NCES enrollment data. Very small groups may be suppressed in the source, so categories do not always sum exactly to total enrollment.
Gender split
Test scores
ISAT 2024-25 . % ProficientEnglish Language Arts
74.3%
ID avg 53.4%
Math
46.4%
ID avg 43.5%
Source: ISAT. All students, all grades. See all years and grades →
7-year change
SY 2017-18 vs SY 2024-25Enrollment
1,743
-158 (-8%) vs 2017
Student : Teacher
20.3:1
was 21.1:1
% White
74%
was 75%
% Hispanic
13%
was 12%
% Black
4%
was 4%
% Asian
4%
was 4%
Source: NCES Common Core of Data
About CENTENNIAL HIGH SCHOOL
CENTENNIAL HIGH SCHOOL is one of the sprawling secondary schools in BOISE, Idaho, one of the schools within JOINT SCHOOL DISTRICT NO. 2, with 1,743 students on its rolls from grades 9 through 12. By comparison, Idaho's public schools average about 455 students each, so CENTENNIAL HIGH SCHOOL sits 283% larger than that benchmark.
Across the 61 schools in JOINT SCHOOL DISTRICT NO. 2 (38,740 students total), CENTENNIAL HIGH SCHOOL accounts for its share of the district's footprint.
For racial and ethnic makeup, CENTENNIAL HIGH SCHOOL logs that the largest single group is White, at 74% of enrollment. The remainder reads as 13% Hispanic, 5% multiracial, 4% Black, 4% Asian. That is meaningfully less White than the county at large, where the share is closer to 83%.
Looking at school resources, CENTENNIAL HIGH SCHOOL lists 86 full-time-equivalent teachers, putting the student-to-teacher ratio at about 20.3:1. The state averages around 16.0:1, so this campus is higher than the state norm typical. Roughly 30% of students at CENTENNIAL HIGH SCHOOL qualify for free or reduced-price lunch, a number frequently used as a low-income enrollment indicator.
In the broader community, the surrounding county (Ada County) logs that median household earnings sit near $91,502, 45% of adults hold a bachelor's degree or higher, and the poverty rate sits near 5%. CENTENNIAL HIGH SCHOOL is one of 156 public schools in Ada County (combined enrollment of about 80,006 students).
JOPLIN ELEMENTARY SCHOOL is the nearest neighboring public school, about 0.4 miles from this campus. Within five miles, there are 8 other public schools.
CENTENNIAL HIGH SCHOOL operates from a city-core location.
Five-year trend. Looking back 7 years, enrollment at CENTENNIAL HIGH SCHOOL has ticked down 8%, going from 1,901 students in 2018 to 1,743 in 2025.
In the discussion threads here, the feed for CENTENNIAL HIGH SCHOOL typically covers pickup logistics, teacher feedback, and after-school programs. Parents, students, alumni, and staff are welcome to weigh in.
Ada County at a glance
View full county profilePopulation
518,935
Census ACS
Median income
$91,502
Household, ACS
Bachelor's+
45%
Adults 25+
Poverty rate
5%
Below federal line
Schools in county
156
80,006 students
Quick facts
Related schools
Other schools in JOINT SCHOOL DISTRICT NO. 2
- MOUNTAIN VIEW HIGH SCHOOLHigh · 2,463 students
- OWYHEE HIGH SCHOOLHigh · 1,884 students
- ROCKY MOUNTAIN HIGH SCHOOLHigh · 1,848 students
- MERIDIAN HIGH SCHOOLHigh · 1,774 students
- EAGLE HIGH SCHOOLHigh · 1,765 students
- VICTORY MIDDLE SCHOOLMiddle · 1,075 students
Other schools in BOISE
- BOISE SENIOR HIGH SCHOOLHigh · 1,512 students
- BORAH SENIOR HIGH SCHOOLHigh · 1,308 students
- TIMBERLINE HIGH SCHOOLHigh · 1,307 students
- iSUCCEED VIRTUAL HIGH SCHOOLHigh · 1,290 students
- INSPIRE VIRTUAL CHARTER SCHOOLCombined · 1,210 students
- CAPITAL SENIOR HIGH SCHOOLHigh · 1,170 students
Nearby schools
- JOPLIN ELEMENTARY SCHOOL0.4 mi · 241
- FLYERS CENTER0.4 mi · 10
- PIONEER SCHOOL OF THE ARTS0.6 mi · 658
- PATHWAYS IN EDUCATION - WEST ADA0.7 mi · 79
- LOWELL SCOTT MIDDLE SCHOOL0.7 mi · 773
- iSucceed Academy0.7 mi · 345
Frequently asked questions
About CENTENNIAL HIGH SCHOOLHow many students attend CENTENNIAL HIGH SCHOOL?
CENTENNIAL HIGH SCHOOL enrolls approximately 1,743 students in grades 09-12.
Is CENTENNIAL HIGH SCHOOL an elementary, middle, or high school?
CENTENNIAL HIGH SCHOOL is a high school covering grades 09-12.
How many students per teacher at CENTENNIAL HIGH SCHOOL?
Approximately 20.3:1 students per teacher at CENTENNIAL HIGH SCHOOL.
How diverse is CENTENNIAL HIGH SCHOOL?
CENTENNIAL HIGH SCHOOL reports a student body of 74% White, 13% Hispanic, 4% Black, 4% Asian, 5% Two or more.
What district is CENTENNIAL HIGH SCHOOL in?
CENTENNIAL HIGH SCHOOL is part of JOINT SCHOOL DISTRICT NO. 2.
Data sourceSchool profile facts are sourced from the NCES. Community content is posted by allk12 members.