2008–09 Celtic League
The 2008–09 Celtic League was the eighth Celtic League season and the third with Magners as title sponsor. The season began in September 2008 and ended in May 2009. Ten teams played each other on a home-and-away basis, with teams earning four points for a win, and a bonus point for scoring four or more tries in a match. Losing teams also earned a bonus point if they lost by seven points or less.
The ten competing teams consisted of the four Irish provinces, Munster, Leinster, Connacht and Ulster; two Scottish regions, Edinburgh Rugby and Glasgow Warriors; and four Welsh regions, Cardiff Blues, Newport Gwent Dragons, Ospreys and Scarlets. The Scarlets were originally known as the "Llanelli Scarlets", but renamed themselves at the start of the season, in order to reflect their regional identity.
Munster were crowned champions on 30 April 2009 after the Ospreys beat the Newport Gwent Dragons 27–18 but failed to claim a bonus point.
Teams
| Team | Stadium | Capacity | City, Area |
 Cardiff Blues | Cardiff Arms Park | 12,500 | Cardiff, Wales |
 Connacht | Galway Sportsgrounds | 5,500 | Galway, Republic of Ireland |
 Edinburgh | Murrayfield Stadium | 67,144 | Edinburgh, Scotland |
| Glasgow Warriors | Firhill Stadium | 10,887 | Glasgow, Scotland |
| Leinster | RDS Arena | 18,500 | Dublin, Republic of Ireland |
| Munster | Thomond Park Musgrave Park | 26,500 8,300 | Limerick, Republic of Ireland Cork, Republic of Ireland |
| Newport Gwent Dragons | Rodney Parade | 12,000 | Newport, Wales |
| Ospreys | Liberty Stadium | 20,500 | Swansea, Wales |
| Scarlets | Parc y Scarlets Stradey Park | 14,870 10,800 | Llanelli, Wales |
| Ulster | Ravenhill | 12,800 | Belfast, Northern Ireland |
Table
Results
Round 1
Welsh Round 1
- All-Welsh Round 5 matches played mid-week to allow Welsh teams to play in the Anglo-Welsh Cup.
Round 2
Round 3
Round 4
Round 5
Round 6
Round 7
Welsh Round 2
- All-Welsh Round 6 matches played mid-week to allow Welsh teams to play in the Anglo-Welsh Cup.
Round 8
1872 Cup 1st round
Round 9
1872 Cup 2nd round
Round 10
Round 11
Round 12
Round 13
Round 14
Round 15
Round 16
Rearranged fixtures
- Round 13 match rescheduled to allow Ospreys to play in the Anglo-Welsh Cup semi-final.
- Round 15 match rescheduled to allow Cardiff Blues to play in the Anglo-Welsh Cup final.
Round 17
Rearranged fixture
- Round 13 match rescheduled to allow Cardiff Blues to play in the Anglo-Welsh Cup semi-final.
Round 18