No... not the world, but certainly one of the longest in the Southern Hemisphere.
It''s only 1532 metres long now, and a nice for a casual stroll, especially around sunrise or sunset. Originally opened in 1881 at a length of about 1500 metres, it was found to be still too short for the larger ships to berth and collect produce from the surrounding farmers. It was extended in 1883 to 1680 Metres.
Bagged wheat was even bought in via the Port Germein George which was opened in 1879, two years before the Jetty was finished. A massive amount of manual labour.