MySpace.com was atop the rankings of US social networking sites, with 60.1 mln visitors in December 2007, up from November 2007 57.4 mln unique visitors and 55.3 mln in December 2006, according to Nielsen Online.
| Sites | Audience, December 2006 | Audience, December 2007 | Growth, YTY |
| Myspace.com | 55,256 | 60,104 | 9 |
| 13,110 | 22,574 | 72 | |
| Classmates Online | 11,406 | 10,748 | -6 |
| Windows Live Space | 8,703 | 8,856 | 2 |
| AOL Hometown | 9,032 | 6,853 | -24 |
| Club Penguin | 2,688 | 6,358 | 137 |
| 2,072 | 4,804 | 132 | |
| Reunion.com | 4,327 | 4,090 | -5 |
| AOL Community | 5,213 | 4,069 | -22 |
| Flixster | 744 | 3,097 | 316 |