The Mountain View, Calif.-based search firm enjoys market share dominance in Europe that surpasses its U.S. position, where it nevertheless typically records a market share of more than 50 percent.
"Even more so in the U.K. than in the U.S., when people think of search, they think of Google," said Rand Schulman, WebSideStory's chief marketing officer, in a statement. "This has large implications for U.K. marketers."
Trailing behind Google in the U.K. was Yahoo, whose second place finish was 9.30 percent, according to the market research firm that offers a range of online marketing and analysis products.
Other top online search finishers in the U.K., cited by WebSideStory, and their market shares are: MSN, which finished in third place with a 5.46 percent share of the market, followed by AOL, 4.21 percent, and Ask Jeeves 2.28 percent. (Ask Jeeves recently changed its name to Ask.com.)