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Dear Trojan Students and Parents:

Welcome to Thornton High School! The faculty and staff are committed to providing our students with a rich, challenging, and meaningful educational experience during your time with us. Our academic programs are designed to offer every student the opportunity to excel while at THS and to build a strong foundation for success after high school. We look forward to working in partnership with you throughout your high school career as you make course selections and plan for your future.

Video in Spanish

New Students:

Thanks for your interest in enrolling at Thornton High School.

School Tours

We are excited to have you here, but we understand you might have some questions, or want to see what we have to offer your child and family before enrolling. Please call us to schedule a tour and meet the staff. 

Enrollment Process for NEW Students

  • Step 1: Check your address on the boundary locator to determine we are your neighborhood’s school. 

  • Step 2: Download the online forms or pick up an enrollment packet at the school.

  • Step 3: Complete the forms and gather the necessary documentation. Documentation includes: Parent/Guardian photo ID; child’s birth certificate; one proofs of residence; immunization records; and prior school records.

  • Step 4: Email the completed enrollment packet and forms to your school’s registrar. View complete list of registrars.  
    See instructions for submitting the enrollment packet and documents.

For questions and more detailed information, visit

Out of boundary students 

  • If you are out of our school’s boundary and wish to attend, you must apply when the Choice window is open if we have spots available. 

If you have any questions, please contact us directly at (720) 972-4800 or the district admissions office

Document(s)SizeUpload Date
PDF icon THS Registration Guide 2020-2021.pdf707.74 KB03/03/2020
PDF icon THS Spanish Registration Guide 2020-2021.pdf1.41 MB03/03/2020