Trinity High School is a Roman Catholic high school in Renfrew, Scotland. Its enrolment is approximately 905 students as of September 2012. The school's building was originally the site of the state school Renfrew High, but in 1975 Renfrew High School moved to a new larger site, and the building became Trinity High School. Over the years an ICT block and an extension have been built. The extension now houses the Religious Education department, Home Economics department and the Modern Languages department.