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Mt Diablo High School

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Absence Reporting

If you think your child is going to be absent, please contact the attendance office at (925) 682-4030 ext. 3445




Register to Vote

Questions About This Site?

We always love feedback and we occasionally make mistakes. Let us know. Email our Leadership Advisor any time:

School Calendar

Picture Make-ups

ID Picture Make-Up Day is Tuesday, September 24. Students who missed the original date can be sent to the Small Gym during their PE or Social Studies classes. 

Only students who are purchasing photographs may get re-takes. 

School Photos

Orders are still available at

Site council elections

Congratulations to the winners of the Mt Diablo High School Site Council Elections. Beverly Johnson has been elected to represent parents and community members. Mirely Mercado-Ornelas has been elected to represent students. Haley Davis, Elizabeth Ennis, and Lorie Johnson have been elected to represent teachers. The first school site council meeting will be tonight, September 10th at 5:45  pm in AC-53.

Letter from the Principal

Dear Mt. Diablo High School Parents and Students,

Welcome to Mt. Diablo High School for the 2019-2020 school year!  For those of you returning, welcome back! If you are new, welcome to our MDHS family. Our students have shown themselves to be resilient learners and this is going to be another awesome year as we learn and grow together.

At Mt. Diablo High School, our vision is to graduate students prepared for college, career, and civic responsibility. Our mission is to raise our students’ ability to read, write, and think critically through engaging, rigorous, standards-based instruction. With the talent and promise that our students possess, and a student centered faculty and staff that holds each student to high expectations, the sky will be the limit.

You are also expected read and reference our school handbook, which provides a brief summary of our school procedures, student expectations, and guidelines. You are also encouraged to activate your Homelink accounts, which provides up to date information on student grades and attendance.

We are always available to discuss school concerns with our families.  When we partner together, we create a positive, welcoming atmosphere for learning. In addition, we make it easier for our students to succeed.

We invite you to share our vision for educational success by joining other parents as one of our Parent Club volunteers, Sports Booster Club members, becoming a member of the School Site Council, participating on the English Learners Advisory Council (ELAC), or other committees. Please contact the front office if you are interested in being a member of any of these groups.  

Let's continue to raise the bar and give our students the education they deserve.


Mr. Lorne M. Barbosa



No Shots, No Schedule, No School!
Don’t get caught by surprise, Get your students immunized!
 School starts 8/15/19.  Make sure to get your vaccine!

Get accurate information about  MDUSD Immunization requirements for students to attend school:

Intradistrict Transfers

Applications are available online from October 15 , 2018 - November 15, 2018. 

No paper applications.

Follow this link

and then click on 'Transfers'.

Click below for more information:

Intradistrict Transfer doc.pdf (PDF)

For information about unassigned areas, please click below:

Intradistrict Unassigned Area .pdf (PDF)


Office Hours

Regular Office Hours

7:30 am - 4:00 pm

Support Staff

Are you updated on our sports?

Library hours

The Library will be available on Thursdays and Fridays from 7:45 a.m. to 3:30 p.m. Come prepared with a student ID to check out a maximum of 3 books. Become lost in worlds that you can only discover by reading a book!