In January 2007, Wikipedia entered for the first time the top-ten list of the most popular websites in the United States, according tocomScore Networks. With 42.9 million unique visitors, Wikipedia was ranked number 9, surpassing the New York Times (#10) and Apple(#11). This marked a significant increase over January 2006, when the rank was number 33, with Wikipedia receiving around 18.3 million unique visitors.As of March 2015, Wikipedia has rank 5 among websites in terms of popularity according to Alexa Internet. In 2014, it received 8 billion pageviews every month. On February 9, 2014, The New York Times reported that Wikipedia has 18 billionpage views and nearly 500 million unique visitors a month, "according to the ratings firm comScore."
On January 18, 2012, the English Wikipedia participated in a series of coordinated protests against two proposed laws in the United States Congress—the Stop Online Piracy Act (SOPA) and the PROTECT IP Act (PIPA)—by blacking out its pages for 24 hours.More than 162 million people viewed the blackout explanation page that temporarily replaced Wikipedia content.
Loveland and Reagle argue that, in process, Wikipedia follows a long tradition of historical encyclopedias that accumulated improvements piecemeal through "stigmergic accumulation".
On January 20, 2014, Subodh Varma reporting for The Economic Times indicated that not only had Wikipedia's growth flattened but that it has "lost nearly 10 per cent of its page-views last year. That's a decline of about 2 billion between December 2012 and December 2013. Its most popular versions are leading the slide: page-views of the English Wikipedia declined by 12 per cent, those of German version slid by 17 per cent and the Japanese version lost 9 per cent."Varma added that, "While Wikipedia's managers think that this could be due to errors in counting, other experts feel that Google's Knowledge Graphs project launched last year may be gobbling up Wikipedia users."When contacted on this matter, Clay Shirky, associate professor at New York University and fellow at Harvard's Berkman Center for Internet and Security indicated that he suspected much of the page view decline was due to Knowledge Graphs, stating, "If you can get your question answered from the search page, you don't need to click [any further]."