36% Facebook Penetration in France,with 47.8 million Internet users

In France, 47.8 million internet users spent a total of nearly 1.2 billion hours online in December 2011. Google Sites was the top online property by unique visitors, attracting over 44.8 million people who spent a total of 137.5 million hours on the site. During December,  over 39.2 million users went to Microsoft Sites making it the second most popular online property ranked by visitors.. Facebook was the leading site in terms of engagement with over 32.9 million unique visitors spending 165.5 million hours on the site during the month

Socialbakers data show Facebook Penetration in France at 36.43% compared to the country's population and 52.88% in relation to number of Internet users.One of the French companies ranking amongst the largest web properties was retailer Groupe PPR. Their audience increased by nearly 12 percent from October 2011 to December 2011, when most Ba population) in June 2011, according to Internet World Stats. (Internet world Stats, August 2011)

Source: StatCounter Global Stats - Social Media Market Share

Statscounter France  data in for the last one year Twitter and Youtube takes the 2nd and 3rd place with a huge margin.