The most popular online property in the world in December was Google Sites, with 777.9 million visitors, followed by Microsoft Sites (647.9 million visitors), Yahoo! Sites (562.6 million visitors).

The rankings are based on data from the comScore World Metrix audience measurement service.

Facebook.com, which has grown a dramatic 127 percent in the past year to 222 million visitors, now ranks as the top social networking site worldwide and the seventh most popular property in the world.

Top 15 worldwide properties, ranked by total worldwide unique visitors, December 2008

  1. Google: 775,980,000
  2. Microsoft: 646,915,000
  3. Yahoo!: 562,571,000
  4. AOL: 273,020,000
  5. Wikimedia: 272,998,000
  6. eBay: 240,947,000
  7. Facebook: 221,791,000
  8. Amazon: 187,354,000
  9. CBS: 178,844,000
  10. Fox Interactive: 172,841,000
  11. Ask: 164,513,000
  12. Apple: 161,500,000
  13. Tencent: 158,617,000
  14. Baidu: 152,447,000
  15. Adobe: 123,623,000