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Welcome to Thornton High School

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An International Baccalaureate Diploma Programme School

Thornton High School's International Baccalaureate Programme provides opportunities, expectations and support for each student to become a knowledgeable, open-minded, active, and caring citizen of an ever-changing world. To this end, the programme challenges students to think critically, develop respect for different points of view, and embrace a lifelong journey of learning, hard work and academic excellence.


Total Commitment to High Achievement and Success for All.


Thornton High will be a high performing school that provides a continuum of learning for IB students along the Thornton corridor, THS will provide an environment that promotes:

  • A viable authentic curriculum
  • Personalization of the learning experience for every student
  • In an atmosphere of democratic decision-making

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Address9351 N Washington Street
Thornton, CO
Office Phone720-972-4800
Fax Number720-972-4999
Office Hours7:00 am - 3:30 pm
School Hours7:15 am - 3:00 pm
Early Release
7:10am - 12:30pm

Upcoming Events

Senior Parent Night

Senior Parent Night

Date & Time: Wed, 04/22/2020 - 5:45pm
Location: Auditorium

04/22/2020 - 5:45pm
Apr 22

Senior Parent Night

Senior Parent Night

Date & Time: Wed, 04/22/2020 - 7:00pm
Location: Auditorium

04/22/2020 - 7:00pm
Apr 22



Date & Time: Fri, 04/24/2020 (All day)

04/24/2020 (All day)
Apr 24

Senior Awards Night

Senior Awards Night

Date & Time: Wed, 04/29/2020 - 6:30pm
Location: Field House

04/29/2020 - 6:30pm
Apr 29

Upcoming Sports