After more than 313 kms of competition, Ogier finished the closing Wedding Bells II Power Stage, north of the Coffs Harbour rally base, just 6.8sec ahead of Volkswagen team mate Jari-Matti Latvala.
The Finn picked up more than three seconds and two stage wins this afternoon in a lunge for victory.
Latvala won the points-paying power stage from Ogier and third Volkswagen driver Andreas Mikkelsen of Norway.
The Volkswagen Motorsport 1-2-3 finish ensured the German team won its second straight WRC Manufacturers Trophy today.
The drivers' title remains undecided.
Ogier, who also won here in 2013, led the event over 13 stages including throughout the final day but the fight was tighter than it appeared.
Only Latvala and Citroen's Kris Meeke were able to spend time at the front and the leader's margin was never more than 11.8sec throughout the event.
At one stage it was as little as 0.4sec.
Australian Chris Atkinson finished 10th and almost 9m:30sec behind the winner after a challenging return to the WRC with Hyundai.
His New Zealand team mate, Hayden Paddon, was the top-scoring Hyundai driver, in sixth position.
The 23rd Australian WRC event was attended by large crowds at the spectator stages and hailed a success by organisers who welcomed an announcement over the weekend that the rally would return on September 10-13 next year.