ShieldAzure, between lymphads Argent upon a rocky islet Proper a tower Or with openings Gules surmounted by a lion rampant of fourth.
CrestThat for the regiments and separate battalions of the Puerto Rico Army National Guard: On a wreath Argent and Azure, upon a closed book Gules with pages edged Or a paschal lamb couchant with staff and banner of San Juan (Gules a cross Argent) all Proper.
MottoTODO POR LA PATRIA (All for the Country).
ShieldThe shield is blue for Infantry. The charges represent the history and service of the militia of Puerto Rico, particularly the defense of San Juan against the English in 1797. The castle and the rocks stand for the small isle of San Juan; the golden tower and red door represent the gold expended and the blood shed in its defense. The lion over the tower signifies that it was the offspring of the Spanish lion which defended it and the sailing boats departing towards the open sea represent the retiring enemy fleet.
CrestThe shield is that of the Puerto Rico Army National Guard.
The coat of arms was approved on 9 February 1923.