2022-2023 Millis High School Profile The Town of Millis is a suburban town in the Charles River Valley, 26 miles southwest of Boston, 32 miles east of Worcester, and 32 miles north of Providence, RI. With a population of 8,300, Millis covers an area of 12 square miles. Millis High School is a public academic institution accredited by the New England Association of Schools and Colleges with an enrollment of 329 students in grades 9-12. Millis High School has consistently been ranked among the top high schools in the Commonwealth of Massachusetts and the nation. The small size of the school truly allows staff to personalize the educational experience for each student. The school motto, “Small School, Big Family” is lived by students, staff and community alike