The Pew Research Center recently updated their annual report on who is using social media. Here are a few key findings and an infographic:

• 16% of U.S. Internet users are active on Twitter, which is more popular with black and Hispanic users, adults aged 18-29, and people who live in urban areas.
• Women are 5 times as likely as men to use Pinterest.
• City dwellers are significantly more likely than rural residents to be on Twitter.
• Blacks and Hispanics are more likely than whites to use Instagram.
• Pinterest attracts higher-educated affluent women.

The infographic below (courtesy of Adweek) compares the use of Twitter, Pinterest, Instagram, Tumblr, and Facebook across gender, age, urbanity, race/ethnicity, education, and household income.