Shield
Argent, a saltire Gules cantonned by in chief a cross pate, in base a five-bastioned fort both of the like, dexter three fleur-de-lis in bend Azure, sinister the same in bend sinister.
Crest
That for the regiment and separate battalions of the Massachusetts Army National Guard: From a wreath Argent and Gules, a dexter arm embowed, clothed Blue and ruffed White Proper the hand grasping a broad sword Argent the pommel and hilt Or.
Motto
SEMPER PARATUS (Always Prepared)
Shield
National flag blue is the branch color used for Infantry units, the service of the former organization. The 101st Infantry's service is indicated by a white shield for Infantry with the red saltire to denote Civil War Service. The red Maltese cross was the badge of the 2d Brigade, 1st Division of the 5th Corps during the War of the Rebellion. The red five-sided bastioned fort was the badge of the 3d Brigade of the Provisional Division of the 5th Corps of the Spanish War. The six fleurs-de-lis represent the six major operations in which the regiment took part in World War I.
Crest
The crest is that of the Massachusetts Army National Guard.
The coat of arms was originally approved for the 101st Infantry, Massachusetts National Guard on 5 Feb 1924. It was amended for the 101st Regiment Infantry, Massachusetts National Guard on 27 Jul 1927. On 25 Mar 1997 the coat of arms was redesignated, with description and symbolism revised, to the 101st Regiment, Massachusetts Army National Guard.