The website is also losing popularity among all other age groups, CNET reported.
The survey, conducted by market research firm Frank N. Magid Associates, revealed that the percentage of youth aged 13 to 17 who use Facebook in the US has fallen to 88 percent this year, from 94 percent in 2013 and 95 percent in 2012.
Among all the other age groups examined in the study, in total, 90 percent use Facebook, down from from 93 percent in the past two years.
Other surveys have also found teens moving to other socially-networked sites, such as Instagram, now owned by Facebook.
Of the people polled in the Frank N. Magid's survey, 16 percent said Facebook was trendy, 18 percent found it fun and 16 percent said it was informative.
Only nine percent, however said, it was safe and another nine percent said it was trustworthy.