A two-time Olympian, Bannister, had been living and training in the Netherlands. There were believed to be no suspicious circumstances in his death, the Australian media reported.
Bannister is Australia's javelin record holder with a throw of 89.02m in 2008. He also represented the country in the 2008 and 2012 Olympics, as well as several world championships.
In 2013, he was controversially given a 20-month ban from competing after missing three anti-doping tests.
Bannister maintained that he had not missed them deliberately. He said in one instance testers had been given wrong information about his whereabouts, the BBC reported.
Athletics Australia said it was "saddened and shocked", while a number of athletes posted tributes online.
"On behalf of Athletics Australia, I extend our deepest condolences to Jarrod's family and friends and urge the athletics fraternity to support each other at this difficult time," Chief Executive Darren Gocher said in a statement.
(This story has not been edited by Social News XYZ staff and is auto-generated from a syndicated feed.)
