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 ranking.

750,000,000 – Estimated Unique Monthly Visitors,  – Compete Rank,  – Quantcast Rank,  – Alexa Rank.

 

250,000,000 – Estimated Unique Monthly Visitors, – Compete Rank, – Quantcast Rank,  – Alexa Rank.

110,000,000 – Estimated Unique Monthly Visitors,  – Compete Rank, – Quantcast Rank, – Alexa Rank.

85,500,000 – Estimated Unique Monthly Visitors,   – Compete Rank, – Quantcast Rank, – Alexa Rank.

70,500,000 – Estimated Unique Monthly Visitors, – Compete Rank, – Quantcast Rank ,  – Alexa Rank.

65,000,000 – Estimated Unique Monthly Visitors.

25,500,000 – Estimated Unique Monthly Visitors, – Compete Rank, – Quantcast Rank, – Alexa Rank.

20,500,000 – Estimated Unique Monthly Visitors, – Compete Rank, – Quantcast Rank, – Alexa Rank.

19,500,000 – Estimated Unique Monthly Visitors, – Compete Rank, – Quantcast Rank, – Alexa Rank.

17,500,000 – Estimated Unique Monthly Visitors,   – Alexa Rank.

12,500,000 – Estimated Unique Monthly Visitors, – Compete Rank, – Quantcast Rank, – Alexa Rank.

12,000,000 – Estimated Unique Monthly Visitors,  – Compete Rank,   – Quantcast Rank, – Alexa Rank.

 

7,500,000 – Estimated Unique Monthly Visitors, – Compete Rank, – Quantcast Rank, – Alexa Rank.

5,400,000 – Estimated Unique Monthly Visitors,   – Compete Rank,  – Quantcast Rank, – Alexa Rank.<br/>

4,000,000 – Estimated Unique Monthly Visitors, – Compete Rank,  – Quantcast Rank, – Alexa Rank.