[3] In 2019, a town vote approved the phased construction of a new Arlington High School on the footprint of the existing campus.

In 2010, Arlington High School attracted national attention after it declined a student's request to make reciting the Pledge of Allegiance mandatory.

[12] For many years, Arlington High's athletic teams were known as the Indians or the Red and Gray, the school's colors and the name of its fight song.

The figure, modeled on The Menotomy Hunter, a Cyrus E. Dallin sculpture located in Arlington Center, was the subject of protest, leading to its replacement with a simple "A" logo.

[14] Arlington High fields teams in alpine skiing, baseball, basketball, cross country, e-sports, field hockey, football, golf, gymnastics, ice hockey, indoor and outdoor track, lacrosse, soccer, softball, swimming, tennis, volleyball, and wrestling.