A gold color metal and enamel insignia 1 1/8 inches (2.86 cm) in height overall consisting of a blue star of thirteen points, one point up, bearing a gold saltire between three smaller gold saltires, all above a gold scroll, the middle section surmounting the star, inscribed "SERVICE TO THE SOLDIER" in red letters.
The star of thirteen points refers to the unit's numerical designation. The central saltire stands for the command and the three smaller saltires for the Corps which it supports. The colors gold (for buff), red and blue are used in the flags of combat service support units. They refer to the supply and service, maintenance, transportation and other support functions of the command.
The distinctive unit insignia was originally approved for the 13th Support Brigade on 25 August 1966. It was redesignated for the 13th Corps Support Command and amended to revise the symbolism effective 21 June 1975. The insignia was redesignated for the 13th Support Command on 17 October 1980. It was redesignated for the 13th Corps Support Command on 10 August 1989. The insignia was redesignated for the 13th Sustainment Command on 7 March 2006.