2005 Sydney Roosters season
This 2005 Sydney Roosters season was the 98th in the club's history. They competed in the NRL's 2005 Telstra Premiership and finished the regular season 9th.
Results
| Round | Opponent | Result | Syd | Opp. | Date | Venue | Crowd |
| 1 | South Sydney Rabbitohs | Win | 24 | 12 | 12 Mar | Aussie Stadium | 22,186 |
| 2 | Penrith Panthers | Win | 28 | 20 | 20 Mar | Penrith Stadium | 18,228 |
| 3 | Brisbane Broncos | Loss | 22 | 40 | 25 Mar | Aussie Stadium | 23,157 |
| 4 | Wests Tigers | Loss | 26 | 32 | 3 Apr | Aussie Stadium | 13,946 |
| 5 | Canberra Raiders | Loss | 16 | 24 | 10 Apr | Canberra Stadium | 19,130 |
| 6 | Canterbury-Bankstown Bulldogs | Win | 29 | 16 | 15 Apr | Telstra Stadium | 27,111 |
| 7 | St George-Illawarra Dragons | Loss | 24 | 26 | 25 Apr | Aussie Stadium | 26,246 |
| 8 | North Queensland Cowboys | Loss | 18 | 38 | 30 Apr | Dairy Farmers Stadium | 22,476 |
| 9 | Newcastle Knights | Win | 32 | 2 | 8 May | Aussie Stadium | 8,921 |
| 10 | New Zealand Warriors | Win | 10 | 6 | 15 May | Ericsson Stadium | 10,082 |
| 11 | BYE | ||||||
| 12 | Canberra Raiders | Win | 30 | 16 | 28 May | Central Coast Stadium | 16,253 |
| 13 | Manly-Warringah Sea Eagles | Loss | 18 | 22 | 3 Jun | Aussie Stadium | 19,787 |
| 14 | BYE | ||||||
| 15 | Cronulla-Sutherland Sharks | Loss | 10 | 16 | 17 Jun | Toyota Park | 16,355 |
| 16 | Parramatta Eels | Win | 12 | 8 | 24 Jul | Aussie Stadium | 14,885 |
| 17 | Newcastle Knights | Win | 28 | 14 | 2 Jul | EnergyAustralia Stadium | 14,950 |
| 18 | Wests Tigers | Loss | 16 | 26 | 10 Jul | Telstra Stadium | 13,768 |
| 19 | New Zealand Warriors | Loss | 22 | 24 | 16 Jul | Aussie Stadium | 13,789 |
| 20 | Melbourne Storm | Loss | 10 | 24 | 24 Jul | Olympic Park | 8,212 |
| 21 | St. George Illawarra Dragons | Loss | 6 | 44 | 29 Jul | WIN Stadium | 19,512 |
| 22 | Penrith Panthers | Loss | 28 | 30 | 7 Aug | Aussie Stadium | 13,742 |
| 23 | Cronulla-Sutherland Sharks | Win | 14 | 8 | 13 August | Aussie Stadium | 7,842 |
| 24 | South Sydney Rabbitohs | Loss | 16 | 17 | 20 August | Aussie Stadium | 17,319 |
| 25 | Brisbane Broncos | Win | 17 | 10 | 26 Aug | Suncorp Stadium | 35,592 |
| 26 | Canterbury-Bankstown Bulldogs | Win | 32 | 12 | 4 September | Aussie Stadium | 8,903 |