SOCIAL NETWORK DEMOGRAPHICS: Here's who's on Facebook, Snapchat, Instagram, and other top social networks now

• Pinterest has tremendous reach among women. Among US female internet users, 42% reported being on Pinterest in Pew's late-2014 survey, compared to only 13% of men.
• Instagram has become the most important and most-used social network for US teens. 32% of US teenagers cited it as their most important social network in Piper Jaffray's twice-annual teen survey, compared to only 14% saying that of Facebook.
• Snapchat, Vine, and Tumblr had by far the most youthful user bases of the social networks we looked at. 45% of Snapchat's adult users are between 18 and 24, followed by Vine (28%) and Tumblr (28%), according to comScore.
• LinkedIn enjoys high adoption among highly educated and high-income users. LinkedIn is used by 44% of Americans with income of $75,000 or more, according to Pew.
• Messaging apps also have become more broadly popular, but still skew young: 7% of all people in the US aged 12 and older use WhatsApp, according to the Edison Research and Triton Digital survey.
• The aging of Facebook, Twitter, LinkedIn, and even Pinterest is more apparent than ever. That's especially true of Facebook: Less than two-fifths of Facebook's adult user base in the US is aged 18 to 34, according to comScore.

In full, the report:

• Looks at overall social networking adoption in the US and globally
• Assesses the most important demographic skews at the top social networks, including Facebook, Snapchat, Twitter, Instagram, LinkedIn, Pinterest, YouTube, and Tumblr
• Examines the rise of image-sharing social networks like Instagram and Snapchat
• Compares how demographics have changed over time as older social networks have matured

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