The 2011 Football League One play-off final was an association football match which was played on 29 May 2011 at Old Trafford in Manchester, between Huddersfield Town and Peterborough United, to determine the third and final team to gain promotion from Football League One to the Football League Championship. The top two teams of the 2010–11 Football League One season, Brighton & Hove Albion and Southampton, gained automatic promotion to the Championship, while the teams placed from third to sixth position took part in play-offs. The winners of the play-off semi-finals competed for the final place for the 2011–12 season in the Championship. AFC Bournemouth and Milton Keynes Dons were the defeated semi-finalists, losing to Huddersfield Town and Peterborough United respectively.

Huddersfield Town Association Football Club is a professional association football club based in Huddersfield, West Yorkshire, England. The team competes in the EFL Championship, the second level of the English football league system. They will play in EFL League One in the 2024–25 season after suffering relegation.