It has been 99 per cent full and has had an average of 89,143 people for the two matches played there, the Mirror reported.
The home of English rugby, Twickenham, has been the next favourite with an average capacity of 97 per cent and 79,125 people in attendance. Twickenham hosted the opening ceremony and game between England and Fiji, as well as last weekend's blockbuster between England and Wales.
Italy and France also played at the 82,000 capacity London stadium, and the Wallabies v England game there this weekend is already sold-out.
Queen Elizabeth Olympic Park in London has had 95 per cent capacity on average and so has Brighton Community Stadium.
Sandy Park in Exeter (82), Kingsholm Stadium in Gloucester (86) and Elland Road Stadium in Leeds (88) are the only grounds to have an average attendance of below 90 per cent.
The teams to attract the biggest crowds are England and Ireland respectively, with Wales, Fiji, New Zealand and Romania following closely behind in that order.
Last week it was reported the 2015 Rugby World Cup in England and Wales was already smashing all sorts of records when compared to previous editions of the tournament.
Before the World Cup had even started more tickets had been sold than in France in 2007 - the previous best - and commercial revenues were up 60 per cent last week from New Zealand's 2011 World Cup.