Gregory Neil Hartung AO (born 3 June 1948) is a leading Australian and international sport administrator.

[4] Hartung was dux of his class in his final year at St Laurence's College and captain of the First XV rugby union team, which were joint premiers.

[4] In 1970, Hartung completed a Bachelor of Arts degree and Diploma of Journalism at the University of Queensland.

[2] He has a Master of Arts from the University of Sydney and his thesis examined the impact of lobbying on Australian Government's decision-making process.

[4] His wife Maureen Hartung OAM is executive director of the Blue Gum Community School in Canberra.

[6] His daughter Catherine, recently completed a PhD in children's rights at the University of Wollongong.

[8] In 2023, Hartung authored the book "The Great Arm Wrestle: Australian Sport Policy since 1939".

[2] Peter Dutton, Minister for Sport made the following comments about Hartung after his resignation as APC President.

Greg has made a significant contribution to the national and international Paralympic movement and has helped to increase support and respect for athletes with a disability.

In fact, the Australian team has not finished outside the top five in the medal tally at the Summer Paralympic Games during Greg's tenure, with Australian athletes earning 85 medals at the London 2012 Summer Paralympic Games.

[18] On 23 November 2009, Hartung was elected the vice-president of the International Paralympic Committee Governing Board at a meeting of the IPC General Assembly in Kuala Lumpur.