The US remains the largest country by Facebook audience by some distance, and with 63% growth since April it has moved up to being the 12th most penetrated country in the list, behind the Dominican Republic, Iceland, Norway, Canada, Denmark, Singapore, Hong Kong, UK, Chile, Australia, and Sweden still ahead of it in penetration. If the Facebook figures are in fact unduplicated users (which they almost certainly are not, but it’s likely the duplicate rate is probably no more than 10 percent we’d hazard to guess) this means almost a third of all Americans are on Facebook.

Here is the complete list:
Facebook Penetration November Update

In addition, you can see that over this time period the average number of monthly users has grown to about 197 million in the US, although the rate of growth of users and minutes has been roughly the same, meaning users are not really using the web much more intensely than before. The daily UV figures are also fairly static.

Facebook and Youtube are large and have seen mega-growth over the last three years, and yet they are probably underperforming in terms of their revenue per user hour figures. Any change in their ability to monetize their traffic will certainly have a huge impact in the overall online advertising figures. Figures below are in millions of minutes per month.