10/06/2008 05:12 am ET Updated May 25, 2011

Online TV Viewership Exploding

When the fall TV season kicks off this month, a sizable chunk of viewers won't be stationed in front of the tube.

Nearly one in five US households watches TV programming online, double the number in 2006, a new survey from research organizations TNS and the Conference Board shows.

The top destinations for TV viewing were the TV networks' own Web sites and Google's YouTube.

About 65 percent said they visited the networks' homepages and 41 percent said they went to YouTube.

About 13 percent visited Apple's iTunes; 7.6 percent did their viewing on Hulu and 5.4 percent went to Limewire. Others turned to social networking or file-sharing sites.

The study, which comes just days before the big networks debut their new fall shows, is the most recent indication that online TV viewing is steadily growing.

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