U.S. mobile search market is expected to boom throughout 2011, according to a study by eMarketer.

The number of U.S. mobile Internet users will rise from 27 millions in 2006 to nearly 65 millions in 2011, up over 140 percent.

Mobile search users, which account for about 74 percent of overall mobile Internet users in 2006, will grow from 20.3 millions to 55.8 millions, making up over 85 percent of the total online mobile users in 2011.

Mobile search ad revenue, accounting for merely US$2.1 million in 2006, is skyrocketing – it will exceed US$700 million in 2011, with an overall 339 percent growth within five years, eMarketer reported.