And 40 per cent plan to buy one.
Research firm Piper Jaffray claims 34 per cent of American teens own an iPhone, which rises from 23 per cent in autumn 2011 and 17 per cent from a year ago.
Meanwhile, 40 per cent plan to buy an iPhone in the next six months, up three per cent on the previous year.
Additionally, a further 34 per cent owns a tablet, which is up from 22 per cent a year ago. Of the third that own tablets, 70 per cent were iPads, 19 per cent were Android tablets and 11 per cent were Kindle Fires.
In comparison, further results show just 17 per cent own an e-reader, up from 11 per cent the previous year.