Colony High School Home

About Us

The Chaffey Joint Union High School District serves the communities of Ontario, Montclair, Rancho Cucamonga, and portions of Fontana, Upland, Chino, and Mount Baldy. With over 25,000 students, the District is the fourth largest high school district in California. It has eight comprehensive high schools, a continuation high school, an online high school, a community day school, an adult school, and alternative programs. The District offers a wide variety of instructional options that provide a quality education for each student, every day. The District's well-prepared, dedicated, and highly qualified teachers and support personnel are second to none.
 
The Chaffey Joint Union High School District Board of Trustees are steadfast in the belief that "Nothing is more important than student learning and their achievement."
 
Our daily purpose encompasses our commitment:
"To provide student learning, and ultimately their achievement, of the prescribed curriculum that takes place in the classroom under the direction of the teacher." The Chaffey District supports this daily act. We realize that our efforts uniquely influence the future of our community and of this nation, and we are passionate about doing whatever it takes to prepare students to be successful and contributing citizens of the 21st century.
 
The Chaffey District has provided a quality education for high school students in the area since 1911. As the District continues to grow and progress, we are poised to meet the challenge of providing the finest quality education possible for every student. 
Colony High School campus photo
All CJUHSD students will graduate ready for college and careers.

Recent News

Finals Schedule

Please see attached document for the Fall finals schedule.

Upcoming Events

Board Meeting

Time: 5 PM – 8 PM
Location: Montclair High School

School Facts

  • 65% of Colony High School graduates meet the University of California and California State University A-G admissions requirements, making it a leader in San Bernardino County.
  • 90% of freshmen at Colony High School complete their first year of high school on track to graduate.
  • The CJUHSD has been named a Top Workplace by the Press-Enterprise and Inland News Group.
  • 900 Advanced Placement exams are administered to students at Colony High School annually.

Principal's Message

Portrait of Dr. Tiffany Bunn
Colony High School Students, Parents and Guardians,
 
Welcome to the 2025–2026 School Year! As summer quickly flies by, I am excited to welcome our 10th through 12th graders back to campus on July 22 for summer registration ahead of our first day of school on August 6.
 
Please take the time to carefully read all the summer mailer documents and registration paperwork that will be sent to you via Parent Square. If your email, phone number, or mailing address has changed, be sure to contact the school so we can update our records.
 
If you need assistance with the registration process, you may attend registration for grades 10–12 on July 22, 2025, from 8:00 a.m. to 12:00 p.m. During this time, students can pick up a copy of their class schedule and take their ID photo (please note that dress code will be enforced, and hats are not permitted). The student store will also be open for purchasing PE clothes, ASB cards, and Titan Spirit Gear.
 
For parents and guardians of incoming freshmen, I invite you to attend our Freshmen Parent Kickoff in the theater on Wednesday, July 23, from 8:00 a.m. to 12:00 p.m. Topics will include the importance of student engagement, COHS academic goals, and ways you can best support our shared vision. Parents/guardians will also be able to get a tour of our campus and pick up a copy of their student's schedule. Additionally, the student store will be open for purchasing PE clothes, Titan Spirit Gear, and ASB cards.
 
As we work together to meet our achievement goals, I cannot emphasize enough the importance of open communication. Your active engagement with Colony High School helps strengthen the partnership needed to support your student’s success. I encourage you to get involved with groups such as ELAC, AAPAC, School Site Council, or other stakeholder committees. For more information on how to get involved, please contact the school and ask for Anthony Fiorenza, Assistant Principal of Student Achievement.
 
It is my hope that all students arrive at Colony High School ready to have fun, connect with the Titan community, and most importantly, engage fully in our high-quality educational programs so they can graduate college and career ready. As summer continues, I hope you find time to rest, spend quality moments with friends and family, and prepare mentally and emotionally for an exciting and successful 2025–2026 school year.
 
If you have any questions or need further assistance, please feel free to reach out to me or any member of the Titan support team.
 
Sincerely,
 
 
Dr. Tiffany R. Bunn
Principal, Colony High School