comScore, Inc., a leader in measuring the digital world, released its monthly comScore qSearch analysis of the U.S. search marketplace. Americans conducted 13.1 billion core searches in February 2009, down 3 percent versus January - a decline that is primarily the result of the shortened month.

February 2009 U.S. Core Search Rankings

Google Sites led the U.S. core search market in February with 63.3 percent of the searches conducted, followed by Yahoo! Sites (20.6 percent), Microsoft Sites (8.2 percent), Ask Network (4.1 percent) and AOL LLC (3.9 percent).

Americans conducted 13.1 billion searches at the core search engines, down 3 percent from January. Google Sites handled 8.3 billion core searches, followed by Yahoo! Sites with 2.7 billion and Microsoft Sites with 1.1 billion.

February 2009 U.S. Expanded Search Rankings

In the comScore February 2009 analysis of the top properties where search activity is observed, Google Sites led with 11.3 billion searches, down 4 percent versus January. Yahoo! Sites ranked second with 2.8 billion searches, followed by Microsoft Sites (1.1 billion) and AOL LLC (761 million).