A silver color metal and enamel device 1 1/8 inches (2.86cm) in height overall consisting of a shield blazoned: Azure, a pale Argent fretty of the field. Attached below the shield is a silver scroll inscribed "AETERNUS VIGILANTIS" in blue letters. Attached above the shield on a wreath alternating white and blue, the crest for the state of Wisconsin all silver.
The service of the former organization, the 426th Infantry, is indicated by colors blue and white which represents Infantry. The interlaced bands symbolize the binding together of existing companies to organize the regiment.
The distinctive unit insignia was originally approved for the 426th Regiment Infantry on 30 Jul 1953. It was amended for the 426th Infantry Regiment, Wisconsin Army National Guard on 30 Nov 1953. On 29 Sep 1976, the insignia was rescinded (cancelled). The distinctive unit insignia was authorized for the 426th Regiment, Wisconsin Army National Guard, with description and symbolism revised, on 25 Mar 1998.