Venta Icenorum was the civitas or capital of the Iceni tribe, located at modern-day Caistor St Edmund in the English county of Norfolk. The Iceni inhabited the flatlands and marshes of that county and are famous for having revolted against Roman rule under their queen Boudica in the winter of 61 CE.

The Iceni or Eceni were an ancient tribe of eastern Britain during the Iron Age and early Roman era. Their territory included present-day Norfolk and parts of Suffolk and Cambridgeshire, and bordered the area of the Corieltauvi to the west, and the Catuvellauni and Trinovantes to the south. In the Roman period, their capital was Venta Icenorum at modern-day Caistor St Edmund.