The decline is sharper among younger users, according to Edison Research

Facebook has an estimated 15 million fewer US users today than it did in 2017, according to Edison Research data published Wednesday.

In 2017, 67 percent of the total US population over the age of 12 used Facebook, the data says. In 2018, that number dropped to 62 percent, and then it dropped again, to 61 percent, in 2019. That comes out to an estimated 172 million current users, according to Edison Research.