Gules, on a bend Argent three fleurs-de-lis of the first; a canton of the like bordured indented of the second.
On a wreath of the colors Argent and Gules, a black panther's head erased Proper.
The red shield with the white diagonal stripe alludes to the colors used for the Corps of Engineers. The parentage of the Regiment is indicated by the canton, which is the shield of the 3d Engineers with the charge omitted. The fleurs-de-lis represent service in three major engagements during World War I.
The crest commemorates the long service of the 11th Engineers in the Panama Canal Zone.
The coat of arms was originally approved for the 11th Engineer Regiment on 19 August 1924. It was amended to revise the blazon of the shield on 18 February 1937. It was redesignated for the 11th Engineer Combat Battalion on 14 December 1943. It was redesignated for the 11th Engineer Battalion (Combat) on 1 July 1955. The coat of arms was amended to revise the symbolism on 17 November 1972.