Nicholas O'Halloran (born 14 August 1987 in Perth) is an Australian water polo player.

He is currently playing professionally for CN Mataro in the Spanish Water Polo League.

Nick was presented with the UWA sports star of the year award in 2007.

In 2009 he was a member of the Australian team that won the gold medal at the World Student Games,[2] and also represented Australia at the 2009 World Aquatics Championships in Rome.

This biographical article relating to an Australian water polo figure is a stub.