ShieldArgent, a fess Gules of the first and Vert fesswise between, in chief two arrows of the second saltirewise behind a Black hawk Proper and in base a fleur-de-lis of the second, overall a saltire Azure.
CrestThat for the regiments and separate battalions of the Illinois Army National Guard: On a wreath Argent and Azure, upon a grassy field the blockhouse of old Fort Dearborn Proper.
ShieldThe shield is white, the old Infantry color. Service in the Black Hawk War is symbolized by the Black Hawk and the two red arrows, service in the Mexican War by the horizontal belt across the shield of red, white and green, the colors of the Mexican flag. The Civil War service is indicated by the blue saltire cross from the Confederate flag. The service in France during World War I is indicated by the fleur-de-lis.
CrestThe crest is that of the Illinois Army National Guard.
The coat of arms was approved on 17 June 1924.