Loyola School has a two-fold right to the arms and colors of the Loyola Family. According to Spanish custom, the family was known by the paternal and maternal name, Oñaz y Loyola, hence the two shields. The arms of the Loyola family consisted of two gray wolves with a kettle suspended from black pot-hooks. A wolf was the device for nobility, the kettle a symbol of generosity. The wolves held the kettle between them. The wolves and the pot represented an anagram the name of the family, for "lobo," the Spanish for "wolf" and "olla," the Spanish for "pot." were united into Lobo y Olla. The union contracted into "Loyola." The whole design represents the nobility and liberality of the Loyola Family.
|The school's earliest crest displays the Loyola Coat of Arms beneath a federal eagle, with an M surmounted by a cross centered below the two shields. The combination of the cross and the M has a biblical significance, referring to Mary's standing at the foot of the cross, stressing Mary's association with Christ's redemptive mission. The surmounted M is flanked by the letter I on the left and S on the right, furthering combining the familiar Marian symbol with IHS, a monogram made by contracting the first letters of "Jesus" from the Greek. This monogram is part of the official seal of the Society of Jesus. Lastly, the three nails of the Crucifixion appear to the left and right of the monogram, signifying in the Jesuit Order the three vows of poverty, chastity, and obedience.|
|A redesigned crest appears in the late 1950's and was designed by a friend of the school, Mr. W.H. Ryan. Added to the new seal were an English translation and Arabic numerals for the founding date. Also added were the castle/rook top and the beavers. The castle is representative of New Amsterdam and the beavers of New York State. These additions made the seal unique to Loyola School's geographic location: New York, New York. The school's motto, Ex Fide Fortis (From Faith Comes Strength), was added at this time.|
|This centennial revision of the school's crest favors an elongated, hexagonal shield. The red and gold of the Oñaz family have been retained as has the castle/rook top representing New Amsterdam. The letters IMS have been replaced with IHS.|
|The current school seal is a modernized and updated version of the seal from the late 1950's. This seal highlights the school colors of maroon and gold.|
|During the summer of 2016, Tom Geismar was engaged to work with Loyola to improve the visual identity of the school. During this process school colors, fonts, and logos were finalized. Out of this process, a new shield was introduced.|