The Viromandui or Veromandui (, Vermandois) were a tribe of the Belgae, occupying a small region in northern Gaul. We know about them primarily from Julius Caesar's De Bello Gallico, a book chronicling Caesar's early conquests against the Gauls.

The Viromandui or Veromandui (, Vermandois) were a tribe of the Belgae, occupying a small region in northern Gaul. We know about them primarily from Julius Caesar's De Bello Gallico, a book chronicling Caesar's early conquests against the Gauls.