The 2010-11 Celtic League Grand Final was the final match of the 2010–11 Celtic League season. The final was won by Munster who defeated Leinster by 19-9 at Thomond Park to claim their third Celtic League title.

2010-11 was the tenth Celtic League season and the fifth and final season with Magners as title sponsor. It would also prove to be the final season before the league was rebranded as "Pro12" from 2011–12. The regular season began on 3 September 2010 and finished on the weekend of 6–8 May 2011. During these stages, each team played every other team both home and away and were awarded points according to the standard bonus point system. This was the second season to follow the play-off structure to determine the Celtic League champion, with the top four teams qualifying for the semi-finals. The winner of each semi final advanced to the Grand Final, which took place 28 May and was hosted by the team that finished highest in the table following the regular season, which was Munster. The previous week on 21 May, Leinster had won the 2011 Heineken Cup. Munster fielded the same starting line-up from their 18-11 semi-final win against the Ospreys. An ankle injury sustained in the Heineken Cup Final prevented Leinster's Gordon D'Arcy's from starting, Fergus McFadden instead started alongside Brian O'Driscoll in the centre.Heinke van der Merwe and Shane Jennings also started for Leinster instead of Cian Healy and Kevin McLaughlin from the Heineken Cup Final team.

All tickets for the final sold out. The match was shown live on TV in Ireland by RTÉ Two and also by TG4, in the UK the match was covered by BBC Two Wales and BBC Alba. Highlights were shown in Central and Northern Scotland on STV.

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