And most accounts are accessed via mobile.
Facebook secures the bulk amount with more than 900 million users, while Twitter and Linked in have more than 200 million and 150 million, according to regulator the International Telecommunication Union.
Developing countries also have a series of their own platforms to use too, such as Chinese Twitter-like mini-blogging service Weibo.
As fixed broadband becomes the norm, its use reached 591 million at the start of 2012, which is of course, half the number of the world's social network users, leaving them to access their accounts via mobile where ever they are.
However, the report says just 8.5 per cent of the population in developing countries had access to mobile broadband in 2011, and just five per cent of global use came from low income countries, meaning most mobile users will be from developed regions.
22 per cent of LinkedIn unique visitors came from mobile in Q1, up eight per cent year-on-year, while 500 million Facebook users access the network via mobile.
Like what ME does? Make sure you sign up to our daily news headline service by clicking here.