|Born||County Donegal, Ireland|
|Height||5 ft 10 in (1.78 m)|
He plays at wing-back.
Nominated for an All Star award in 2006, he later became hampered by injury which caused him to miss Donegal's 2011 Ulster Senior Football Championship success. A member of the Donegal team that won the National Football League in 2007, playing from the start to the end in the final against Mayo, His injury nightmare began during the 2007 Ulster Senior Football Championship. Having played all the way through the league, including the final won by Donegal, as well as the Ulster Senior Football Championship quarter-final against Armagh, he tore his groin kicking a ball while running out at Clones for the semi-final against Tyrone. In the following years he underwent four major operations, three on the groin and one on the posterior cruciate he ruptured while playing for his club.
- Ulster Senior Football Championship runner-up: [clarification needed] 2006
- National Football League Division 1: 2007
- All Star: 0
- Nominated in 2006
- "Player profiles: Barry Dunnion". Archived from the original on 27 May 2013. Retrieved 27 May 2013.
- Nulty, Chris (22 July 2011). "1992–2011: The best XV not to win Ulster…". Donegal News. Retrieved 22 July 2011.
- "DONEGAL SFC FINAL: Masters marvels". Irish Independent. 13 October 2003. Retrieved 13 October 2003.
- Keys, Colm (5 November 2003). "Royals' seal of approval puts pressure on Boylan". Irish Independent. Retrieved 5 November 2003.
- "Donegal 0-09 1-09 Armagh". BBC Sport. 9 July 2006. Retrieved 9 July 2006.
- "Donegal achieve historic win — First national league title comes to county after victory over Mayo". Donegal Times. 25 April 2007. Archived from the original on 12 April 2015. Retrieved 25 April 2007.
- "The Buzz is back for Barry". Donegal Democrat. 20 April 2012. Retrieved 20 April 2012.
- McNulty, Chris (27 July 2012). "'Baby Give It Up' for the Ulster champions". Donegal News. Retrieved 27 July 2012.
Dunnion hasn’t competitively under Jim McGuinness since the opening National League game of 2011 against Sligo – but the Four Masters man is regarded as a key member of the group.