St Mirin's Academy was a Catholic senior secondary school for boys founded in 1922 in Paisley, Scotland, and which closed in 1976. The school was dedicated to St Mirin, the patron saint of the town and of the Diocese of Paisley. The Academy's Latin motto was Fortis et Fidelis ("Brave and Faithful"). The original buildings were in East Buchanan Street next to St Mirin's Church. In 1933 the school relocated to new buildings in Renfrew Road. Neil MacKinnon, the school's longest serving rector (1948–1975), died on 7 May 2009, aged 99.