Virbalis (pronunciationⓘ, Polish: Wierzbołów, Yiddish: ווירבאלן Virbalen, German: Wirballen) is a city in the Vilkaviškis district municipality, Lithuania.

[1] It was the site of the formation of the Virbalis Confederation (Polish: Konfederacja w Wierzbołowie) by Janusz Radziwiłł in 1655 during the Deluge (part of the Second Northern War) whose main purpose was to defend the King of Poland and Grand Duke of Lithuania John II Casimir Vasa.

[1] When in 1861 a branch of the Saint Petersburg–Warsaw Railway was built through Virbalis from Vilnius to the Prussian border, where it was linked to the Prussian Eastern Railway, the Russian border station near the village of Kybartai was named after the neighbouring town of Verzhbolovo.

[5] The German station of the Prussian Eastern Railway on the western side of the frontier was Eydtkuhnen (Eitkūnai);[6] today, as consequence of the annexation of the northern part of East Prussia by the Soviet Union in 1945, it is a Russian border station and is called Chernyshevskoye (Russian: Черныше́вское).

Between mid-July and autumn 1941, an Einsatzgruppe of German SS troops aided by local Lithuanian auxiliary police from Virbalis and Vilkaviškis slaughtered 670–700 Jews from Virbalis and the nearby town of Kybartai in several mass executions.