Suburban
Chaffey Joint Union High School Calendar, Spring Break & Teacher Days 2025-26
Ontario, California · San Bernardino County
22,628
Students
11
Schools
24.1:1
Student-Teacher
939 teachers
9 - 12
Grades
Quick Facts
2,057
Avg. School Size
1,972
Total Staff
Contact
- Address
- 211 West Fifth St.
Ontario, CA 91762 - Phone
- (909)988-8511
Staff & Students
- Teachers (FTE)
- 939
- Total Staff
- 1,972
Data Source
NCES Common Core of Data
School Year 2023-24
Schools in Chaffey Joint Union High (11)
Etiwanda High
Etiwanda
High
3,540 studentsGrades 9 - 1225.5:1 ratio53.22% FRPL
Rancho Cucamonga High
Rancho Cucamonga
High
3,343 studentsGrades 9 - 1226.1:1 ratio37.36% FRPL
Chaffey High
Ontario
High
3,223 studentsGrades 9 - 1223.9:1 ratio80.76% FRPL
Los Osos High
Rancho Cucamonga
High
2,759 studentsGrades 9 - 1225.1:1 ratio34.43% FRPL
Montclair High
Montclair
High
2,605 studentsGrades 9 - 1223.7:1 ratio89.9% FRPL
Alta Loma High
Alta Loma
High
2,400 studentsGrades 9 - 1224.2:1 ratio60.63% FRPL
Ontario High
Ontario
High
2,121 studentsGrades 9 - 1222.3:1 ratio87.36% FRPL
Colony High
Ontario
High
2,085 studentsGrades 9 - 1224:1 ratio72.23% FRPL
Valley View High (Continuation)
Ontario
High
335 studentsGrades 9 - 1213.4:1 ratio84.48% FRPL
Chaffey District Online High
Ontario
High
112 studentsGrades 9 - 1222.4:1 ratio53.57% FRPL
Chaffey Community Day
Ontario
High
16 studentsGrades 9 - 128:1 ratio81.25% FRPL
Frequently Asked Questions about Chaffey Joint Union High
You can view and subscribe to the Chaffey Joint Union High 2025-26 school calendar on this page. Add district holidays, spring break, and teacher workdays to your calendar.