Shield
Per fess nebuly Azure and Argent and per chevron counterchanged, in chief a pair of wings elevated and displayed Or.
Crest
On a wreath of the colors Argent and Azure issuant from a wreath of rice Or and palm Vert tied of the second a demi-dragon Gules.
Motto
VIGILANTIA AETERNA (Eternal Vigilance).
Shield
Ultramarine blue is traditionally associated with Aviation units. The curved nebuly partition line is a heraldic representation of clouds. The triangular edge rising above the line stands for Mount Rainier with its peak above the clouds. Mount Rainier is a landmark of the unit's place of activation. The golden eagle's wings above the peak and clouds refer to the unit's aviation function.
Crest
The oriental dragon symbolizes the unit's wartime service in Vietnam and participation in eleven campaigns. Red refers to the Meritorious Unit Commendation; the rice alludes to the Republic of Vietnam Civil Action Honor Medal, and the palm represents the awards of the Republic of Vietnam Cross of Gallantry with Palm.
The coat of arms was originally approved for the 4th Aviation Battalion on 15 November 1963. It was rescinded on 8 July 1976. It was reinstated on 15 May 1980. It was amended to add a crest and change the color of the shield on 15 May 1980. The insignia was redesignated for the 4th Aviation Regiment on 10 July 1987.