In the wake of the French Revolution, Wirschweiler was part of the Department of Sarre, and more locally, of the arrondissement of Trier.

In the course of administrative restructuring in Rhineland-Palatinate, Wirschweiler was grouped in 1969 into the Birkenfeld district and the Verbandsgemeinde of Herrstein.

[5] The German blazon reads: Schild durch einen halben goldenen Schräglinkswellenbalken geteilt, vorne in Rot ein blaugezungter goldener Löwenrumpf nach links, hinten rot-silber geschacht.

The bend sinister (slanted stripe) refers to the border brook, the Gladenbach, between Wirschweiler and Sensweiler, which once marked where the “Hinder” County of Sponheim and the Waldgraviate-Rhinegraviate met.

The “chequy” pattern on the sinister (armsbearer's left, viewer's right) side is a reference to the village's former allegiance to Sponheim.