Viron may refer to any of several different topics including:
Viron, a Finnish word for "Estonia's" or "of Estonia"
Viron, a Greek form of Byron and an alternative form of the city of Vyronas in suburban Athens, Greece
Viron (pronunciation: VY-ruhn) is also a fictional city in The Book of the Long Sun by Gene Wolfe
Viron or Virion (pronunciation: VY-ruhn) refers to a single virus particle.
Viron is also a surname
Viron is a playable race in the computer RTS game Ground Control 2.
There are companies that have the name Viron:
Viron Enervy Services