As of May 2013, 15% of American adults ages 18 and older do not use the internet or email.
Asked why they do not use the internet:
34% of non-internet users think the internet is just not relevant to them, saying they are not interested, do not want to use it, or have no need for it.
32% of non-internet users cite reasons tied to their sense that the internet is not very easy to use. These non-users say it is difficult or frustrating to go online, they are physically unable, or they are worried about other issues such as spam, spyware, and hackers. This figure is considerably higher than in earlier surveys.
19% of non-internet users cite the expense of owning a computer or paying for an internet connection.
7% of non-users cited a physical lack of availability or access to the internet.