Social Media LinkedIn tops 100 million users—infographic explains its growth Did you know that more than half of LinkedIn users live outside the U.S.? It’s true. And Brazil is the fastest-growing nation on the site. Learn more. By Susan Young@sueyoungmediaMarch 23, 2011 SHARE The social networking channel surpassed 100 million users. According to Mashable, the network is adding one new member per second. To read the full story, log in. Become a Ragan Insider member to read this article and all other archived content. Sign up today Already a member? Log in here. Learn more about Ragan Insider.