St. Sebastian's College (Sinhala: සාන්ත සෙබස්තියන් විදුහල, Tamil: செயிண்ட் செபாஸ்டியன் கல்லூரி) is a Catholic educational institution in Moratuwa, Sri Lanka, established in 1854. The college enrolls over 4,000 students served by a staff of over 200. The college motto is "Exspecta Dominum Viriliter Age", meaning "Expect the Lord and act manfully" in Latin.