Saint Isaac

Saint Isaac may refer to:

• Isaac, son of Abraham in the Old Testament
• Isaac of Dalmatia (died 383), confessor
• Isaac of Armenia (died c. 438), Catholicos of Armenia
• Isaac (died c. 450), of the Holy Monastic Fathers slain at Sinai and Raithu
• Isaac of Monteluco (died c. 550), also known as Isaac of Spoleto
• Isaac the Syrian (6th or 7th century), also known as Isaac of Nineveh
• Isaac of Cordoba (died 851), of the Martyrs of Córdoba
• Isaac of Dafra
• Isaac Jogues (1607–1646)
• Isaac I of Optina (1810–1894)
• Isaac II of Optina (1865–1938)

• Saint Isaac's Cathedral, in Saint Petersburg, Russia
• Saint Isaac's Square, in Saint Petersburg, Russia
• Saint Isaac's Bridge, the first bridge across Neva river in Saint Petersburg, Russia