Shield
Per bend Azure and Gules, on a bend Or between in chief a cross pate Argent and in base a triangle of the first fimbriated of the third charged with a sun in splendor of the same, a five-bastioned fort of the fourth fimbriated Sable.
Crest
From a wreath Or and Azure four rifles two and two saltirewise conjoined forming the Roman notation XX Or.
Motto
TANT QUE JE PUIS (To The Limit Of Our Ability).
Shield
The regiment was organized in 1861 as the Second Battalion of the 11th Infantry and as such saw service in the Civil War. The first engagement was at Yorktown in 1862. The greater part of the Civil War service was in the Second Division of the 5th Corps, the badge of which was a white cross pate. The designation changed to the 20th in 1868. The regiment saw service in Cuba in the Spanish War as a portion of the 5th Corps at El Caney and San Juan. The badge of the 5th Corps was a five-bastioned fort. In the Philippine Islands it saw service in the Pasig Campaign of 1899. The Katipunan device is shown in the base.
Crest
The rifles form the Roman numeral XX, the numerical designation of the Regiment.
The coat of arms was approved on 19 August 1921. It was amended to correct the blazon of the crest on 9 July 2015.