St. Ignatius may refer to:
People
- Ignatius of Antioch (died ), third Patriarch of Antioch, considered a saint by the Roman Catholic and Orthodox Churches
- Ignatios of Constantinople ( – 877), Patriarch of Constantinople, considered a saint by the Roman Catholic and Eastern Orthodox Churches
- Ignatios the Sinaite, feast day January 29
- Ignatius of Smolensk (died 1210), feast day January 29
- Ignatius of Loyola (1491–1556), founder of the Society of Jesus, considered a saint by the Roman Catholic Church
- Ignatius of Methymna (1492–1566), feast day October 14
- Ignatius of Laconi (1701–1781), Capuchin friar, canonized in 1951, considered a saint by the Roman Catholic Church
- Ignatius Brianchaninov (1807–1867), considered a saint by the Eastern Orthodox church
- Ignatius (Bazyluk) of Jabłeczna (died 1942), hieromartyr, feast day July 28 and August 9
- Ignatius Maloyan (1869–1915), Armenian Catholic saint and hieromartyr
Places
- St. Ignatius, Guyana, South America
- St. Ignatius, Montana, US
- St. Ignatius (White Oak), a Catholic parish in Ohio, US
- St. Ignatius Hospital, Washington, US
See also
- St. Ignatius Church (disambiguation)
- Saint Ignatius College (disambiguation)
- St. Ignatius High School (disambiguation)
- St. Ignatius Catholic School (disambiguation)