From the Pew Global Attitudes Project:
In 15 of 21 countries, at least 25% of those polled use social networking sites.
Israel (53%) and the U.S. (50%) top the list.
About four-in-ten of all adults in Britain (43%), Russia (43%), Spain (42%), Lithuania (39%) and Poland (39%). Among this group, Russia is the only country where nearly all internet users are on social networking sites. Only 6% of Russian internet users say they do not go on these sites.
Germany, France, and Japan are the only countries polled where more internet users say they do not go on social networking sites than say they do. While 35% of Germans use social networking sites, 44% go online but do not use such sites; the comparable numbers are 35% and 38% in France and 25% and 33% in Japan.
About three-in-ten are on social networking sites in Ukraine (30%), Turkey (29%), Jordan (29%), and Egypt (28%).
Social networking is generally more common in higher income nations; however, this is largely driven by the fact that wealthier countries have higher rates of internet access. People in lower income nations who have online access use social networking at rates that are as high, or higher, than those found in affluent countries.
In most of the countries surveyed, there has been only marginal change in social networking use since 2010. Two notable exceptions are Egypt and Russia – countries where the role of social media in recent political upheaval has been the subject of considerable attention. In both nations, usage has increased by ten percentage points over the past year, from 18% in 2010 to 28% in 2011 in Egypt and from 33% to 43% in Russia.
*This poll was completed by surveying 1,000 people in each country via the telephone or face-to-face from March-April, 2011.