Jason Hadfield Dunstall (born 14 August 1964) is a former Australian rules footballer who played for the Hawthorn Football Club in the Australian Football League (AFL).

Dunstall is an Australian rules footballer from Queensland. Dunstall was one of the first of a generation of big-bodied lead-up full-forwards who could also out-wrestle opponents for position in a marking contest and was also an agile team-orientated player. He was a full-forward during an era in which power forwards—including Tony Lockett, Gary Ablett Sr., Warwick Capper, Allen Jakovich, Simon Beasley, Saverio Rocca, John Longmire, Tony Modra and Peter Sumich—dominated the league goalkicking. He is one of only six players to have kicked over 1,000 career goals in the VFL/AFL, and only Lockett and Collingwood's Gordon Coventry have kicked more career goals. In an interview in 2011, champion North Melbourne footballer Wayne Carey regarded Dunstall as the best player he had seen and played against. In 2024, he was promoted to be one of just 32 Legends in the Australian Football Hall of Fame.

After finishing as a player, Dunstall became a prominent football media personality, commentating matches for various radio stations in Melbourne and appearing regularly on Fox Footy as host of the show Bounce.

Dunstall was born and raised in Brisbane as one of three sons, his brothers are Harry and Nicholas. He attended the Anglican Church Grammar School from 1977 to 1981. At school he played soccer as a goalkeeper and also rugby union. His junior Australian rules football was spent playing with the Coorparoo Football Club in the then Queensland Australian Football League (QAFL). He grew up supporting the Carlton Football Club due to Coorparoo wearing the same jumper and aspired to one day play for the VFL club.

In 1984, as a 20-year-old, Dunstall made his senior debut and enjoyed a stellar season, claiming the QAFL leading goalkicker award with 73 goals in the home and away season and kicking seven goals in Coorparoo's Grand Final win.

Attracting interest from the VFL, Dunstall approached Carlton; however, the club appeared to not be interested. He instead receive an offer to train with Fitzroy, but reserves coach Brian Walsh was not impressed, choosing to recruit fellow Queenslander Scott McIvor instead. Dunstall was recruited to VFL club Hawthorn in 1985, touted as a new tall forward option, his recruitment largely overshadowed by the hype of West Australian recruit Steve Malaxos.

While not immediately impressed by Dunstall's appearance, Allan Jeans became somewhat of a father figure over the course of the 1980s as his coach. When a group of players was arrested after a night during an overseas trip, Jeans was called to the local police station to address their detention. Jeans' advice to the officer has become a highlight of premiership reunion events - he reputedly advised the officer in charge he was free to shoot "him, him and him, but don't shoot the fat one" as he looked at his star full-forward.^{[citation needed]}

Dunstall made his 1985 VFL debut against Melbourne at Princes Park. He had an immediate impact, kicking an impressive three goals and three behinds in his team's demolition of the Demons; however, he was third in the team’s goalkicking, behind Dermott Brereton and John Kennedy. He was dropped from the side three games later after a loss to Richmond; however, he regained some form towards the end of the season, finishing with 35 goals. In his breakout game against Richmond, he would kick eight goals, and the media heralded the twenty-year-old Queenslander as a future star.