Horizon Middle School opened in 2004. The design of the school was awarded the Grand Prize for design excellence in the 2005 edition of Learning By Design, a national publication that showcases excellence in school and university design. A school district design team of 17 parent, teacher and administrator representatives worked with architects from Rozeboom Miller Architects, Minneapolis, Minn., to ensure that the school's design would be appropriate for implementation of the middle school model for students in grades 6-8.
The school was named using the metaphor, "horizon", which represents the dawn with the sun rising on the horizon just as the middle school students are at the dawn or beginning of the next stage in their education and their lives. Middle school is also a time when students are expanding their knowledge, or their horizons, by learning and studying a variety of subjects and participating in new activities.
The Horizon Middle School Campus expanded in 2017 with Horizon East serving grades 7-8 students and Horizon West serving grades 5-6 students.