Excerpt from this article:
A 2013 Pew Research Center survey found some key reasons that some people do not use the internet. A third of non-internet users (34%) did not go online because they had no interest in doing so or did not think the internet was relevant to their lives. Another 32% of non-users said the internet was too difficult to use, including 8% of this group who said they were “too old to learn.” Cost was also a barrier for some adults who were offline – 19% cited the expense of internet service or owning a computer.
The Center’s latest analysis also shows that internet non-adoption is correlated to a number of demographic variables, including age, educational attainment, household income and community type.