NSW (10) 14
Tries: Hayne (2) Williams Goals: Gidley
Queensland (18) 24
Tries: Inglis, Folau, Lockyer, Smith Goals: Thurston 4
Queensland are celebrating a record four straight series win
Valiant Queensland defending saw them resist a New South Wales fightback to clinch the 2009 State of Origin series.
Tries from Greg Inglis, Israel Folau and Darren Lockyer combined with some awful NSW defending saw the Maroons race into an 18-0 first-half lead.
An intercept try and a short barge over from Jarryd Hayne plus a David Williams score reduced the deficit to 18-14.
But Cameron Smith crossed late on as the Maroons claimed a record-breaking fourth straight series win.
It was a superb effort from a visibly tired Queensland after the break as they defended set after set as NSW searched for a potentially decisive score.
It gives Queensland an unassailable 2-0 lead with one match left to play.
But there had been no sign of the drama to come in the early phase of the game, which was not shown on British television following the collapse of Setanta.
NSW's tackling in the early minutes was atrocious, allowing Inglis to burst through their defensive line for the opening score.
The Blues continued to fall off the tackles and Folau was the next to profit, bursting through midfield before crossing under the posts.
The Folau try followed a mistake from winger Williams, who lost possession, and another stray pass from NSW was quickly pounced upon by Lockyer, who had an unopposed run to the line.
Anthony Harrison swooped on a loose ball and thought he had scored the Maroons' fourth try but the video referee ruled against him.
Queensland were superior in every area but Hayne gave his team hope with a length-of-the-field intercept try.
And with half-time looming he barged over from dummy half for another score - though he was perhaps fortunate to be awarded the try.
A Queensland player at marker appeared to be obstructed immediately after the play-the-ball but the Blues were given the benefit of the doubt.
The Maroons camp had been hit by a virus before the game - and although their affected players were able to take to the field their personnel concerns continued on the pitch.
A groggy Inglis left the field after he was caught by a high shot from Trent Barrett, while Sam Thaiday and Ben Hannant played on despite picking up injuries.
But Blues' second-half pressure against a tiring defence eventually paid dividends after 64 minutes.
Billy Slater failed to collect a high ball and from the repeat set Barrett drifted out wide before passing for Williams to barge over.
Kirt Gidley missed his second successive conversion but Blues, trailing just 18-14, continued to press.
Maroons spent most of the second half defending in their own half and their courage and determination was rewarded when Smith swooped on a loose ball to score the decisive try in the final minutes.
New South Wales: Gidley, Hayne, Lyon, Monaghan, Williams, Barrett, Wallace, Kite, Farah, Weyman, Creagh, O'Donnell, Gallen.
Replacements: Poore, G. Stewart, Watmough, Morris.
Queensland: Slater, Boyd, Inglis, Tonga, Folau, Lockyer, Thurston, Price, Smith, Civoniceva, Harrison, Thaiday, Johnson.
Replacements: Hunt, Hannant, Myles, Crocker.