Robert Thirsk High School is a public senior high school in Calgary, Alberta, Canada. It derives its name from Robert Thirsk, a Canadian engineer and physician, and a former Canadian Space Agency astronaut. The high school is located in the Northwest Calgary community of Arbour Lake, and has a capacity of 1,500 students. Robert Thirsk High School officially opened in September 2013. Over 800 grade 10 and 11 students attend the first school year.