As of May 2021, who is Australia's oldest (longest-living) recorded person?

A 111-year-old former grazier from the outback Queensland town of Roma has become Australia's oldest man on record.

The former veterinary surgeon is also a poet and an author who has spent his life on the land, refusing to retire from his 5,300-hectare cattle property in the Maranoa region until his mid-90s.

Much of his longevity he puts down to the simple lifestyle he enjoyed in the bush.

"It's because I do things differently," Mr Kruger said from an armchair at his aged care home.

"I lived very close to nature and I ate mostly what I grew in the garden or the orchard or the farm."

Born on January 13, 1910, before telephones or refrigeration, Mr Kruger has lived through world wars, droughts, depressions and pandemics.

Every day the supercentenarian completes a strict morning exercise regime, soaks up vitamin D outdoors, and works on his latest book – an autobiography of the century he has spent on the planet.

He also manages to keep across current affairs, referencing the state of the nation's vaccine rollout and the growing scourge of domestic violence.

"I don't think [today's world] is a nicer place, I do not," Mr Kruger said.

"People are not happy. They have too much debt … We have far too much money to spend on rubbish.

"Until we got all this computerised technology, life was much more relaxed.

A small party will be thrown to mark the milestone event, with the Australian Book of Records and various politicians expected to attend the celebration.