- 2,375,000,000 people
- Not Applicable ()
As of 29 April 2019, Facebook was the world's largest online social network, with 2.375 billion monthly active users (MAU) based on Q1 2019 results. Facebook reached the 2-billion monthly user milestone on 30 June 2017.
By comparison, Instagram has a reported 1 billion monthly active users (as of June 2018) and around 321 million for Twitter (as of February 2019).