Zimmern's coat of arms is divided by a zig-zag line into two fields: an upper, white half and a lower, red half. This pattern was the arms of the County of Sulz [de], adopted by Zimmern for municipal use after World War II and approved for that function by the post-war provisional Württemberg-Hohenzollern government on 8 June 1949. An earlier pattern, of a castle upon a hill, had been put forward on 27 November 1933 with a tincture suggested by Central State Archive Stuttgart [de], but it was rejected. A corresponding municipal flag was issued by the Zollernalb district office on 29 March 1982.[3]