Per fess Azure and Gules, in chief a Spanish castle, in base a key palewise and a lion rampant fourcheť, all Argent.
That for the regiments and separate battalions of the Oregon Army National Guard: From a wreath of the colors Argent and Azure, a demi-disc Gules charged with the setting sun with twelve light rays Or (the shoulder sleeve insignia of the 41st Division), behind a beaver sejant Proper.
DA MIHI LOCUM (Give To Me A Place).
The blue upper half of the shield represents the original service of the organization with an Infantry Regiment. The castle is taken from the Spanish-American War service medal to indicate service in that war. The lower half of the shield is in the colors of the Engineer Corps. Service during World War I as part of the 116th Engineer Regiment is symbolized by the key, taken from the coat of arms of the City of Angers, France, where the Regiment was stationed. The lion, taken from the coat of arms of St. Vith, Belgium, represents an outstanding achievement of the organization during World War II.
The crest is that of the Oregon Army National Guard.
The coat of arms was originally approved for the 162d Engineer Combat Battalion on 13 August 1953. It was redesignated for the 141st Support Battalion on 23 July 1968.