Olav Gunnar Ballo (born 22 October 1956) is a Norwegian former politician for the Socialist Left Party (SV).
He studied medicine at University of Würzburg, and has worked as a medical doctor.
Ballo was the leader of the National Forensics Institute ("Rettsmedisinsk institutt") in Norway between 2009 and 2010/2011.
The news made the front page of Norway's biggest newspapers, such as Verdens Gang and Dagbladet.
In 1999 he met, and later married, Heidi Sørensen, a politician for the Socialist Left.