Application Process

Come see #ALLHEART (optional)
  • Brave for a Day; Parent Tour and Talk visit dates are scheduled September through January (Preregistration is required online).
  • Contact the Admissions Office for a private tour if desired.
Complete the Online Admission Application
  • Applications for the 2021-2022 school year will be available on September 1 on our website.
  • Early Decision applications due December 15, 2020.
  • Regular Decision applications due January 24, 2021.
  • Submit Tuition Assistance Application (if necessary) Due January 31, 2021.
  • Submit Merit Based Scholarship Application (if desired) Due January 31, 2021.
Take the Entrance Examination
  • All prospective 9th graders must take the PSAT 8/9 as the Entrance Exam. Check-in begins at 8am in the Dining Hall and the test begins promptly at 8:30am. Sign up at under Admissions. Choose either December 5, 2020 or December 12, 2020.
Admissions Interview
  • Once the Admissions Application has been submitted, the admission office will contact you to schedule your family interview.
  • Admissions Interviews will be January 23 and February 6 between 9am and 2pm.
Receive Your Admission Decision
  • Early Decision beginning February 12, 2021.
  • Regular Decision beginning March 1, 2021.
Say “Yes!”
  • Early decision register online by February 26, 2021.
  • Regular decision register online by March 15, 2021.
Questions? Contact Alicia Valdivia, Director of Admissions
707.255.0950 ext. 621 or

Track your Application

We are pleased to offer Admissions Tracker to allow you to check the status of your application. Please click here to access your account, and then sign in with the email address and password established when you completed the online application. You will then be able to view the outstanding items in your admission portfolio. Please note that there may be a delay of a few days for us to manually update your file. 

For more information, please contact

List of 4 members.

  • Photo of Alicia Valdivia

    Alicia Valdivia 

    Director of Admissions; Instructor of Social Studies
    707.255.0950 ext. 621
  • Photo of Megan Dominici

    Megan Dominici '92 

    Director of Outreach
    707.255.0950 ext. 591
  • Photo of David Granucci

    David Granucci 

    Outreach Associate/Head Boys Basketball Coach
    707.255.0950 ext. 730
  • Photo of Jeremy Tayson

    Jeremy Tayson 

    Admissions and Communications Associate; Head Baseball Coach
    707.255.0950 ext. 734

Justin-Siena High School

4026 Maher Street
Napa, CA, 94558
United States
T: 707.255.0950 
F: 707.255.0334
Justin-Siena is a Lasallian Catholic college preparatory community that serves young men and women in grades 9–12.