Sekolah Menengah Sains Hulu Selangor (English: Hulu Selangor Science Secondary School; SEMASHUR) is a Malaysian boarding school located in Hulu Selangor, Selangor. The 60-acre school is located near , 30 kilometres north of Kuala Lumpur. The school's goal, in line with that of the SBP's, is to achieve academic excellence, in both quantity and quality, in the Hulu Selangor district.