More than one in four American adults say they are online "almost constantly", but a small percentage still don't use the Internet at all, a survey showed on March 14.
The Pew Research Center report said growth of smartphones and other mobile devices has made it easier to be always connected.
As a result, the percentage of US adults saying they are almost constantly online rose to 26% from 21% in a 2015 survey.
Overall, the researchers found 77% of Americans go online on a daily basis, including 43% who connect several times a day.
But 11% said they don't use the Internet at all, despite programmes encouraging Americans to use online services. That represents a modest change from 2015, when 15% did not use the Internet.
Older adults are more likely to be offline, Pew said: About one in three of those over 65 did not use the Internet compared with just two percent in the 18-29 age group.
Younger adults, meanwhile, "are at the vanguard of the constantly connected", the Pew report said.
About 39% of 18-to 29-year-olds are online almost constantly and 49% go online multiple times per day.
Frequent Internet users are more likely to be college educated or have incomes above US$75,000 (RM293,782) annually, Pew said.
The findings were based on a survey of 2,002 American adults in January 2018, with a margin of error estimated at 2.4 percentage points. — AFP Relaxnews
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