Facebook users can reach a mean number (average) of more than 150,000 other Facebook users through Facebook friends of friends. A typical or median user can reach over 31,000 people. At two degrees of separation (friends-of-friends), Facebook users in our sample on average reach 156,569 other Facebook users.

However, a small number of Facebook users, who tend to have especially large friends lists that are less connected exaggerate the reach of the typical Facebook user. The median Facebook user from our sample could reach 31,170 people through friends-of-friends. Read More

Russell Heimlich  is a former web developer at Pew Research Center.