Facebook grew 49% over the last 12 months in Spain, while Telefonica-owned Tuenti only increased its traffic 21%. According to comScore MediaMetrix, Facebook registered 14.2 million unique visitors in September 2010, versus Tuenti’s 8.3 million.

In September 2010, more than 99 percent of the 23.1 million Spanish internet users age 6 and older accessed a property in the Portals category, most notably Microsoft and Yahoo!. The Search/Navigation category also ranked near the top with 21.2 million users, followed by Social Networking with 20.8 million unique visitors.

This are the top 10 properties:

1. Microsoft: 20.9 million unique visitors
2. Google (including Youtube): 19.6
3. Facebook: 14.2
4. Yahoo (including Flickr): 10.7
5. Wikimedia: 9
6. Prisa (El País & more): 8.8
7. Schibsted (Anuntis, Infojobs & 20 Minutos): 8.7
8. RCS Media (El Mundo, Expansión & more): 8.7
9. Terra & Telefónica (withouth Tuenti): 8.6
10. Tuenti: 8.3