The 9th series of the State of Origin started on the 25th of April and finished on the 9th May with the Allies taking home the title after beating Vic Metro.
Season[]
Round One[]
| Winning team | score | Losing team | score | Stadium | Date |
| Vic Metro | 16.8 (104) | Vic Country | 9.16.70 | MCG | Wednesday 25 April 2012 |
| South Australia | 10.8 (68) | Allies | 18.10 (118) | Adelaide Oval | Wednesday 25 April 2012 |
| NSW&ACT | 15.12 (102) | Western Australia | 13.9.87 | SCG | Wednesday 25 April 2012 |
Round Two[]
| Winning team | score | Losing team | score | Stadium | Date |
| Western Australia | 10.13 (75) | Vic Metro | 15.4 (94) | Subiaco | Saturday 28 April 2012 |
| Vic Country | 12.13 (85) | Allies | 12.7 (79) | Kardinia Park | Saturday 28 April 2012 |
| South Australia | 20.12 (132) | NSW&ACT | 17.10 (112) | Football Park | Saturday 28 April 2012 |
Round Three[]
| Winning team | score | Losing team | score | Stadium | Date |
| Vic Metro | 12.6 (78) | South Australia | 15.13 (103) | Docklands | Wednesday 2 May 2012 |
| Western Australia | 8.8 (56) | Vic Country | 16.20 (116) | WACA | Wednesday 2 May 2012 |
| NSW&ACT | 8.10 (58) | Allies | 15.14 (104) | Stadium Australia | Wednesday 2 May 2012 |
Round Four[]
| Winning team | score | Losing team | score | Stadium | Date |
| NSW&ACT | 13.22 (100) | Vic Metro | 18.18 (126) | Manuka Oval | Saturday 5 May 2012 |
| South Australia | 8.9 (57) | Vic Country | 14.15 (99) | Adelaide Oval | Saturday 5 May 2012 |
| Allies | 19.14 (128) | Western Australia | 8.13 (61) | Gabba | Saturday 5 May 2012 |
Round Five[]
| Winning team | score | Losing team | score | Stadium | Date |
| Allies | 15.10 (100) | Vic Metro | 11.10 (76) | Aurora Stadium | Wednesday 9 May 2012 |
| Vic Country | 8.8 (56) | NSW&ACT | 17.12 (114) | QEO Bendigo | Wednesday 9 May 2012 |
| Western Australia | 11.7 (73) | South Australia | 10.18 (78) | Subiaco | Wednesday 9 May 2012 |
Ladder[]
| Rank | Team | Played | Won | Lost | Tie | PF | PA | % | Pen | Poi |
|---|---|---|---|---|---|---|---|---|---|---|
| 1. | Allies | 5 | 4 | 1 | 0 | 529 | 348 | 152.01% | 0 | 16 |
| 2. | Vic Metro | 5 | 3 | 2 | 0 | 478 | 448 | 106.70% | 0 | 12 |
| 3. | Vic Country | 5 | 3 | 2 | 0 | 426 | 410 | 103.90% | 1 | 11 |
| 4. | South Australia | 5 | 3 | 2 | 0 | 338 | 480 | 91.25% | 1 | 11 |
| 5. | NSW&ACT | 5 | 2 | 3 | 0 | 486 | 505 | 96.24% | 0 | 8 |
| 6. | Western Australia | 5 | 0 | 5 | 0 | 352 | 518 | 67.95% | 1 | 0 |
Boncer Medal[]
Leaderboard[]
| Player | Votes | |
|---|---|---|
| 1st | Reardo (TA) | 8 |
| 2nd | Gee Dub (NSW) | 6 |
| =3rd | Big Bad Buddy (VC) Deddy (VM) drew23 (NSW) Eth (VM) Loopy_cam (SA) St Fly (VM) |
5 |