Machias Memorial High School (MMHS) is a public secondary school (grades 9–12) located in Machias, Maine, United States. The school was originally established in 1850 as Machias High School, and was later renamed to honor students and alumni who died while serving in the military. The school is a member of Alternative Organization Structure (AOS) 96. MMHS students are residents of Machias as well as the neighboring towns of Jonesboro, Marshfield, Northfield, Roque Bluffs, Wesley, Whitneyville, East Machias, Machiasport, Cutler, and Whiting.