St. Ignatius may refer to:

• Ignatius of Antioch (c. 35 or 50 – between 98 and 117), third Patriarch of Antioch, considered a saint by the Roman Catholic and Orthodox Churches
• Ignatius of Loyola (1491–1556), founder of the Society of Jesus, considered a saint by the Roman Catholic Church
• Patriarch Ignatius of Constantinople (c. 797–877), Patriarch of Constantinople, considered a saint by the Roman Catholic and Eastern Orthodox Churches
• 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

• St. Ignatius, Guyana, South America
• St. Ignatius, Montana, US
• St. Ignatius (White Oak), a Catholic parish in Ohio, US
• St. Ignatius Hospital, Washington, US

• St. Ignatius Church (disambiguation)
• Saint Ignatius College (disambiguation)
• St. Ignatius High School (disambiguation)
• St. Ignatius Catholic School (disambiguation)
• All pages with titles containing St. Ignatius

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