Google again topped search engines for the four weeks ending May 26, accounting for 65.13 percent of all U.S. searches, according to online monitor Hitwise.
The search engine also continued to grow as a source of traffic to key industries, Hitwise said.
For the same four-week period, Yahoo, MSN and Ask.com each received 20.89 percent, 8.4 percent and 3.92 percent of searches, respectively.
The remaining 49 search engines in the Hitwise Search Engine Analysis Tool accounted for 1.66 percent of U.S. searches.
Hitwise found that search engines continue to be the primary way Internet users navigate to key industry categories.
Comparing May 2007 to May 2006, Hitwise found that the travel, news and media, entertainment and business and finance categories received double-digit increases in their share of traffic coming directly from search engines.
The findings were based on U.S. data from a sample of 10 million Internet users.
