Saint Isaac may refer to:
People
edit- Isaac, son of Abraham in the Old Testament
- Saint Isaac of Dalmatia (4th-century–383)
- Saint Isaac of Monteluco, also called St. Isaac of Spoleto (died c. 550)
- Saint Isaac Jogues (1607–1646)
- Saint Isaac of Dafra
- Saint Isaac of Armenia (338–439)
- Saint Isaac of Nineveh (613–c. 700)
Buildings, structures, and places
edit- 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 St.Petersburg, Russia