Today, it serves approximately 1,600 students from grades 9 through 12.

Harrison Trimble High School was named after a civic-minded board Trustee who acquired the parcel of land on behalf of the district, at a time when the area was mostly pasture, thereby saving the school district a lot of money when time came to build.

[citation needed] Harrison Trimble High School has an annual event called the Trojan Trek, where every student from the school walks to the Moncton Hospital to raise awareness for The Neonatal Unit.

[citation needed] The school gained notoriety in 2015 when Vice Principal Shane Sturgeon suspended a female student over the wearing of a dress that exposed her shoulders and back and was said to be a "sexual distraction".

[5] The school again received media coverage in 2015 when teacher William MacGillivray was charged with, and later convicted for, sex crimes against a female student and obstructing police.