The SCS Students' Council is an elected body of students from every grade who plan and oversee a variety of social and other school-based activities throughout the year. These include dances, BBQ lunches, and spirit weeks / dress up days; the annual August "Welcome to High School" orientation at the end of August; Grade 9 Day in September; events related to October's Norfolk County Fair; activities and contests related to Hallowe'en, Christmas/other December holidays, and Valentine's Day; and a variety of other "Fun Days" staged throughout the school calendar. The Council manages a sizable annual budget used to fund these activities, as well as to subsidize school trips, provide monies for school clubs, offset bus and equipment costs for sports teams, et cetera.
The SCS Students' Council operates according to an inherited, generations-old Constitution outlining the duties and responsibilities of each elected member of Council: the Prime Minister and Deputy Prime Minister; Secretary; Social Convenor; Publicity Director and Assistant PD; Treasurer; Specialized Services Rep; Indigenous Rep; and two Grade Reps from each of Grades 9 - 12. Council members meet weekly at lunch to manage their workload and they are duty-bound "to serve the student body of Simcoe Composite School in ways designed to enhance the high school experience," as outlined in the Constitution.