The year 1952 marked the establishment of the present Markham High School District, which comprises approximately the south-east half of Markham. In April 1953, the then York County School Board began construction of the school building on the southside of Church Street east of Mount Joy Creek began. In September 1954, a modern, three hundred pupil Secondary School was opened. The old site on Albert Street became the new home of the Markham Union Masonic Lodge and converted to commercial space in 2009. In July, 1964, construction was started on a vocational addition, which would make the Markham District High School a fully composite school. This was occupied in September 1965. Two years later more accommodation was needed, and the latest addition was opened in January 1970. This building was used until the end of the 2009–10 school year, after which it was torn down. The enrollment for 1971–72 in this large, well-equipped composite school is approximately eighteen hundred students. In 1971 the school transferred to the York Region Board of Education and York Region District School Board in 1998.