The CDC reports that more than one third of American homes are now landline-free, with six in ten adults aged under 30 living in households with only wireless phones.

In a study carried out as part of the National Health Interview Survey, 35.8 percent of all respondents reported having only cellular telephones. A further 15.9 percent reported that while they had landlines, they received all or almost all their calls on their mobiles.

While 34 percent of all adults now live in households with only cellular phones, the number jumps to 40.6 percent when limited to households with children. Fifty-eight percent of renters and 76 percent of adults living with roommates reported having only cellphones. The growth is slowing, though, with the 1.8 percent six-month increase in landline-less homes being the lowest jump since 2008.

Even the elderly are abandoning their landlines, albeit slowly: for the first time, more than 1 in 10 of those aged 65 or more reported living mobile-only.

Early Release of Estimates From the

National Health Interview Survey, January–June 2012 [PDF link]