Duncan MacMillan High School
 Duncan MacMillan High School (DMHS) is a secondary school in Sheet Harbour Nova Scotia Canada. Duncan MacMillan is the smallest high school in the Halifax Regional School Board but it has the largest geographical area for bussing. Duncan MacMillan hosts Grades 7–12 and has about 251–263 students. The school has three feeder schools: Sheet Harbour Consolidated School Eastern Shore Consolidated School in Moser River and Lakefront Consolidated School in Tangier.