2004–05 Premiership Rugby
The 2004–05 Zurich Premiership was the 18th season of the top flight of the English domestic rugby union competitions.
For the first time, two of the opening games of the season were played at Twickenham, in the 2004 London Double Header, between the four "London" teams: Harlequins, London Irish, London Wasps and Saracens.
At the end of the season, Harlequins were relegated, to be replaced by Bristol for 2005-06.
Participating teams
| Team | Stadium | Capacity | City/Area |
| Bath | Bath | 10,500 | Bath, Somerset |
| Gloucester | Kingsholm | 13,000 | Gloucester, Gloucestershire |
| Harlequins | The Stoop | 8,500 | Twickenham, London |
| Leeds Tykes | Headingley Stadium | 22,250 | Leeds, West Yorkshire |
| Leicester Tigers | Welford Road | 16,815 | Leicester, Leicestershire |
| London Irish | Madejski Stadium | 24,161 | Reading, Berkshire |
| London Wasps | The Causeway Stadium | 10,000 | High Wycombe, Buckinghamshire |
| Newcastle Falcons | Kingston Park | 10,200 | Newcastle upon Tyne, Tyne and Wear |
| Northampton Saints | Franklin's Gardens | 12,100 | Northampton, Northamptonshire |
| Sale | Edgeley Park | 10,641 | Stockport, Greater Manchester |
| Saracens | Vicarage Road | 22,000 | Watford, Hertfordshire |
| Worcester | Sixways | 8,477 | Worcester, Worcestershire |
;Notes
Table
Results
Week 1
Week 2
Week 3
Week 4
Week 5
Week 6
Week 7
Week 8
Week 9
Week 10
Week 11
Week 12
Week 13
Week 14
Week 15
Week 16
Week 17
Week 18
Week 19
Week 20
Week 21
Week 22
Play-offs
As for the 2003–04 season, the first placed team automatically qualified for the final, where they played the winner of the second vs third place semi-final. This was the last season in which that format of play-off was used.Semi-final
Final
Zurich Wildcard
Semi finals
Final
Total Season Attendances
| Club | Home Games | Total | Average | Highest | Lowest | % Capacity |
| Bath | 11 | 115,125 | 10,466 | 10,500 | 10,400 | 100% |
| Gloucester | 12 | 142,906 | 11,909 | 13,000 | 6,206 | 92% |
| Harlequins | 11 | 93,305 | 8,482 | 9,999 | 6,447 | 85% |
| Leeds Tykes | 11 | 61,308 | 5,573 | 14,293 | 3,132 | 25% |
| Leicester Tigers | 11 | 184,683 | 16,789 | 16,815 | 16,533 | 100% |
| London Irish | 11 | 154,110 | 14,010 | 51,000 | 6,410 | 44% |
| London Wasps | 12 | 105,068 | 8,756 | 10,000 | 5,824 | 88% |
| Newcastle Falcons | 11 | 87,473 | 7,952 | 10,200 | 6,020 | 78% |
| Northampton Saints | 11 | 130,674 | 11,879 | 12,093 | 11,208 | 98% |
| Sale Sharks | 11 | 91,827 | 8,348 | 10,641 | 6,186 | 78% |
| Saracens | 12 | 129,252 | 10,771 | 51,000 | 3,595 | 36% |
| Worcester Warriors | 11 | 89,624 | 8,148 | 8,498 | 6,348 | 96% |