In August 1987, the doors of Millcreek High School opened for the first time.  Millcreek was established as a result of the vision and foresight of School Board Member, Dr. Sheldon Johnson and Superintendent Steven H. Peterson, regarding the need for more alternatives for students who were not succeeding in the traditional high schools.

The first year student enrollment was 63 with services provided by two teachers, a part-time principal, a secretary and a two hour per week custodian.  The first 14 years, Millcreek was located in the current Washington Historical Society Museum.  After outgrowing the 90 year old building, the student body and staff moved into the new facility in the fall of 2001.  The current facility is a state of the art, technology oriented educational institution that focuses on the success of individual students.  In 2013, an 8,110 sq ft addition and remodel was completed.  This included a commons area, kitchen, pantry, three additional classrooms, an art studio and fitness center. 

Over the years, more and more students have reached their academic and personal goals because of the philosophy of the school: every student has exceptional value and can learn.  The goal of Millcreek High School is for all students to develop the skills to become lifelong learners, responsible citizens, effective communicators and employable individuals.  Educators have high expectations for every student wile striving to meet individual needs.  Students leave Millcreek with confidence that they can succeed in whatever they choose.