Following is the list of Top 10 Social Networking Sites By Number Of Users:
| S.No. | Social Networking Sites | No. of Users |
| 1 | www.Facebook.com | 300 million |
| 2 | www.Myspace.com | 264 million |
| 3 | Windows Live Spaces | 120 million |
| 4 | www.Habbo.com | 118 million |
| 5 | www.Friendster.com | 90 million |
| 6 | www.hi5.com | 80 million |
| 7 | www.Tagged.com | 70 million |
| 8 | www.Orkut.com | 67 million |
| 9 | www.Flixter.com | 60 million |
| 10 | www.Netlog.com | 54 million |
