It was the eighth straight win for the Maroons with a 12-10 victory over the Blues, capped off with a bloke streaking across the field.
It sets a new record for State of Origin since the introduction of OzTAM and is the second-biggest audience this year (My Kitchen Rules finale was 2.95m). The previous high was 2.51m for SoO game 1 last year.
There were 1.16m watching in Sydney alone with 865,000 in Brissy and 464,000 in Melbourne, 95,000 in Adelaide -and another 110,000 on GEM in Perth.
Added with regional viewers the numbers soar to 4.08m viewers -not counting viewers watching in pubs and clubs.
As a result Nine network pulled a mammoth 44.7% share last night, more than twice its nearest rival.
Trailing behind were Seven 20.5%, TEN 15.7%, ABC 14.0% and SBS 5.1%.
Aside from Origin, Nine’s other performers were Nine News and The Block (both 1.34m), ACA (1.14m), Hot Seat (715,000), and Big Bang (577,000 / 364,000).
Numbers for other shows were understandably down across the board.
Seven News (1.21m) led Seven then Today Tonight (1.02m), Home and Away (899,000), RSPCA Animal Rescue (620,000), Deal or No Deal (569,000). The Mole was 281,000 / 239,000.
MasterChef (747,000) was best for TEN followed by TEN News (651,000), Offspring (625,000), The Project (535,000). NCIS: LA was 326,000 and The Simpsons was 293,000.
ABC News (902,000) topped ABC1 then 7:30 (657,000), Qi (612,000), Adam Hills Tonight (561,000), Wednesday Night Fever (332,000) and Restoration Man (320,000).
Bears of the Last Frontier (203,000) was best on SBS ONE then Tour de France (184,000 pre-race / 167,000), World News Australia (152,000), and Toughest Place to Be A... (151,000).
Yes Shaun the Sheep was best on multichannels at 346,000.
ABC News Breakfast: 53,000 / 34,000
OzTAM Overnights: Wednesday 17 July 2013