Aidan John Coyne (born 12 May 2004), is an English-born Australian professional footballer who plays as a defender for National Premier Leagues Victoria club Hume City.
He made his professional debut for Perth Glory in a FFA Cup playoff match against Melbourne Victory on 24 November 2021.
After seven senior appearances for Glory, Coyne moved back to England to sign a professional contract with Watford in November 2022.
On 4 December 2024, Coyne joined Maidenhead United on a 28-day loan.
In March 2025, Coyne joined St Albans City on loan until the end of the season.
Coyne was released by Watford at the end of the 2024-25 season.
In February 2026, Coyne signed for Hume City.
Coyne is the son of former Socceroo Chris and the grandson of former Socceroo John. His uncle Jamie is also a former soccer player. Aidan Coyne was born in England while his father was playing for Luton Town.