The survey released today found that in addition to the 15 percent of adults who don't use the Internet on any device, another nine percent say they only go online at their workplace.
The report by the Pew Research Center found a whopping 92 per cent of these "offline adults" with no interest in using the Internet or email in the near future.
"A lot of people are surprised to discover that not everyone is online," said Kathryn Zickuhr, a Pew researcher and author of the report.
The survey found 34 per cent of the offline Americans said the Internet is not relevant to them, that they are not interested, do not want to use it, or have no need for it.
Another 32 per cent in this group said they believe using the Internet is difficult or frustrating to use, or cite issues such as spam, spyware, and hackers.
The report said the percentage of Americans using the Internet grew sharply from 1995, when just 14 per cent were online, but has held in a range of around 75 to 85 per cent in the past few years.
Age was a major factor in Internet usage: 44 per cent of those 65 and older said they do not use the Internet, compared with 17 per cent of the next-youngest age group, 50 to 64.
Those with lower incomes or less education, and Hispanics were also less likely to go online.
Some 41 per cent who failed to finish high school were not using the Internet, as were 24 per cent of Hispanics and 24 per cent of those in households earning less than USD 30,000 per year, according to the researchers.
Urban and suburban dwellers were a bit more likely to go online than their rural counterparts, the researchers found.
But those who are offline are aware of the value of the Internet: 44 of the offline adults surveyed said they have asked a friend or family member to look something up or complete a task on the Internet for them.
One in seven, or 14 per cent, of the offline group said they had previously used the Internet, but have since stopped for some reason.
Among the Internet users, most had broadband access, with just three per cent using dial-up connections, Pew found.
