From the New Strategist:
Twenty-seven percent of Americans are highly connected to the Internet, accessing the Internet at multiple locations with multiple devices. Another 16 percent of Americans are not connected at all to the Internet, lacking any kind of computer or Internet use. These are the two extremes of what the Census Bureau calls the "connectivity continuum," with everyone else at various stages of connectivity in between (home-only connectivity, single-device connectivity, etc.). At this link you can access the Census Bureau report, Computer and Internet Use in the United States: 2011. The report is admittedly dated, but it captures an historic moment--the transition from pre- to post-Internet age when connectivity sharply divided the population. The highly connected and the unconnected were the two largest segments of the population in 2011.