While I've certainly heard that statement made, the publicly stated demographic statistics do not support it. As of July 2019, 13 - 24 year olds make up 31.9%

While I've certainly heard that statement made, the publicly stated demographic statistics do not support it. As of July 2019, 13 - 24 year olds make up 31.9% of Facebook's overall userbase. Another 32% make up the 25-34 age range. Compare that to some of the other platform's 13-24 demographic: Twitter 39%, Instagram 37.3%, Snap Chat 58.5% While Snapchat has a slightly younger audience, they also only have 210 million active users, a 13% increase from previous year. Facebook on the other hand has 2.45 billion active users, a 9% increase from previous year.