Another 9 percent of adults polled say they use the Internet, but not at home, results of the Pew Internet and American Life project indicated.
At 34 percent, the leading reason cited for not using the Internet was that the information superhighway wasn't relevant, said Pew, based in Washington.
Thirty-two percent of non-Internet users cite reasons tied to the idea that the Internet is too complicated.
Nineteen percent of non-Internet users cite the expense of owning a computer or paying for an Internet connection while 7 percent cited a physical lack of availability or access, results showed.
While not going online themselves, 44 percent of offline adults said they have asked a friend or family member to look up something or complete a task on the Internet for them, Pew said.
A whopping 92 percent of non-users say they have no desire to jump online or use email in the future.
While 76 percent of adults said they use the Internet at home, 9 percent said they use the Internet elsewhere because they don't have home access, Pew said.
Results are based on a nationwide phone survey of 2,252 adults conducted April 17-May 19. The margin of error is 2.3 percentage points.