ShieldArgent, a saltire Gules, in dexter fess a castle with corner towers Murrey and in sinister fess a giant cactus Vert, overall a fleur-de-lis of the first (Argent) on the field fimbriated of the second (Gules).
CrestThat for the regiments and separate battalions of the New York Army National Guard: On a wreath of the colors Argent and Gules, the full rigged ship "Half Moon" all Proper.
MottoSEMPER FIDELIS (Ever Faithful).
ShieldThe shield is white, the old color for Infantry. The saltire cross is for service during the Civil War. The castle is taken from the Spanish campaign medal and represents service during the War with Spain. The cactus stands for Mexican Border duty and the fleur-de-lis for service in France during World War I. The motto translates to "Ever Faithful" and has been used by the Regiment since 1854.
CrestThe crest is that of the New York Army National Guard.
The coat of arms was originally approved for the 174th Infantry Regiment on 13 January 1925. It was amended to include the history of the organization on 7 January 1932. It was redesignated for the 174th Armored Infantry Battalion on 29 July 1955. It was redesignated for the 174th Infantry Regiment on 20 March 1962.