Twenty-five percent of U.S. homes have abandoned fixed lines entirely in favor of cell phones, according to a report by the National Health Interview Survey (pdf). This seems like an amazing statistic, amazing in how low it is.

Everyone has cell phones, why keep landlines? This is the part of the article where one wants to write “not so fast, there’s a lot of people who don’t use cellphones.”

Which is true, but not as true as we originally thought.

Of the 308 million U.S. citizens, 234 million owned cellphones in January 2010, according to comScore. So just a little over than a quarter of people in the U.S. don’t have cell phones.

22.9 percent of American adults live in homes that have mobile phones but no fixed line. The number of wireless-only homes grew 4.3 percent between 2008 and 2009. That’s the surprising part, that people are hanging onto (and paying for) a dying technology while already owning the replacement.

One in seven homes (14.9 percent) have landlines but use mobile phones for most of or all of their calls.

As with everything, younger users are more likely to live in mobile-only homes. 48.6 percent of people aged 25-29 do, as do more than one-third of adults in the 18-24 and 30-34 demographics.

Adults living in poverty (36.3 percent) and at the near-poverty level (29 percent) are more likely to live in mobile-only houses. High-income adults are less likely (19.6 percent).

1.7 percent of U.S. adults don’t own a phone.

By Mark Alvarez