Out of 18,141 respondents aged eight to 17, more than half of them admitted they choose to read a book outside of class at least once a month. And moreover, older pupils are "more likely" to say they have not read any book in the past month than their younger counterparts, the survey revealed.
Researchers at National Literacy Trust, which conducted the study, said that the new generation may grow up to be the 1 in 6 adults who struggle with literacy.
"We are worried that they will grow up to be the 1 in 6 adults who struggle with literacy to the extent that they read to the level expected of an 11-year-old or below," said Trust Director Jonathan Douglas.
Douglas said fresh approaches are "urgently needed" to encourage young people to read more.