Top 15 Most Popular Social Networking Sites | October 2012 Here are the 15 Most Popular Social Networking Sites as derived from our eBizMBA Rank which is a constantly updated average of each website's Alexa Global Traffic Rank, and U.S. Traffic Rank from both Compete and Quantcast. "*#*" Denotes an estimate for sites with limited Compete or Quantcast data. If you know a website that should be included on this list based on its traffic rankings Please Let Us Know. 1 | Facebook 2 - eBizMBA Rank | 750,000,000 - Estimated Unique Monthly Visitors | 2 - Compete Rank | 2 - Quantcast Rank | 2 - Alexa Rank. Most Popular Social Networking Websites | Updated 10/5/2012 | eBizMBA 2 | Twitter 13 - eBizMBA Rank | 250,000,000 - Estimated Unique Monthly Visitors | 24 - Compete Rank | 5 - Quantcast Rank | 9 - Alexa Rank. Most Popular Social Networking Websites | Updated 10/5/2012 | eBizMBA 3 | LinkedIn 27 - eBizMBA Rank | 110,000,000 - Estimated Unique Monthly Visitors | 44 - Compete Rank | 23 - Quantcast Rank | 14 - Alexa Rank. Most Popular Social Networking Websites | Updated 10/5/2012 | eBizMBA 4 | MySpace 84 - eBizMBA Rank | 70,500,000 - Estimated Unique Monthly Visitors | 51 - Compete Rank | 62 - Quantcast Rank | 138 - Alexa Rank. Most Popular Social Networking Websites | Updated 10/5/2012 | eBizMBA 5 | Google Plus+ 95 - eBizMBA Rank | 65,000,000 - Estimated Unique Monthly Visitors | *NA* - Compete Rank | *NA* - Quantcast Rank | *NA* - Alexa Rank. Most Popular Social Networking Websites | Updated 10/5/2012 | eBizMBA 6 | DeviantArt 183 - eBizMBA Rank | 25,500,000 - Estimated Unique Monthly Visitors | 346 - Compete Rank | 74 - Quantcast Rank | 130 - Alexa Rank. Most Popular Social Networking Websites | Updated 10/5/2012 | eBizMBA 7 | LiveJournal 303 - eBizMBA Rank | 20,500,000 - Estimated Unique Monthly Visitors | 605 - Compete Rank | 203 - Quantcast Rank | 102 - Alexa Rank. Most Popular Social Networking Websites | Updated 10/5/2012 | eBizMBA 8 | Tagged 315 - eBizMBA Rank | 19,500,000 - Estimated Unique Monthly Visitors | 447 - Compete Rank | 217 - Quantcast Rank | 282 - Alexa Rank. Most Popular Social Networking Websites | Updated 10/5/2012 | eBizMBA 9 | Orkut 350 - eBizMBA Rank | 17,500,000 - Estimated Unique Monthly Visitors | *NA* - Compete Rank | *NA* - Quantcast Rank | 156 - Alexa Rank. Most Popular Social Networking Websites | Updated 10/5/2012 | eBizMBA 10 | Pinterest 375 - eBizMBA Rank | 15,500,000 - Estimated Unique Monthly Visitors | 205 - Compete Rank | 811 - Quantcast Rank | 109 - Alexa Rank. Most Popular Social Networking Websites | Updated 10/5/2012 | eBizMBA 11 | CafeMom 451 - eBizMBA Rank | 12,500,000 - Estimated Unique Monthly Visitors | 127 - Compete Rank | 82 - Quantcast Rank | 1,144 - Alexa Rank. Most Popular Social Networking Websites | Updated 10/5/2012 | eBizMBA 12 | Ning 456 - eBizMBA Rank | 12,000,000 - Estimated Unique Monthly Visitors | 617 - Compete Rank | 411 - Quantcast Rank | 339 - Alexa Rank. Most Popular Social Networking Websites | Updated 10/5/2012 | eBizMBA 13 | Meetup 621 - eBizMBA Rank | 7,500,000 - Estimated Unique Monthly Visitors | 838 - Compete Rank | 516 - Quantcast Rank | 509 - Alexa Rank. Most Popular Social Networking Websites | Updated 10/5/2012 | eBizMBA 14 | myLife 728 - eBizMBA Rank | 5,400,000 - Estimated Unique Monthly Visitors | 122 - Compete Rank | 391 - Quantcast Rank | 1,670 - Alexa Rank. Most Popular Social Networking Websites | Updated 10/5/2012 | eBizMBA 15 | Badoo 952 - eBizMBA Rank | 2,500,000 - Estimated Unique Monthly Visitors | 1,596 - Compete Rank | 1,148 - Quantcast Rank | 112 - Alexa Rank. Most Popular Social Networking Websites | Updated 10/5/2012 | eBizMBA