A wing was added in 1956 to accommodate student growth and additional construction was done in 1961.

The third, and current, building, opened in fall 2002, and is located at 1060 Sheldon Street, West Suffield, Connecticut.

Suffield High School participates in the North Central Connecticut Conference, and supports many varsity sports.

Girls' athletics include basketball, cheerleading (with Windsor Locks), cross country, dance team, field hockey, golf, indoor track, lacrosse, outdoor track, soccer, softball, swimming, tennis and volleyball.

Suffield High School has one of the largest agricultural education departments in the region.