Where does the Atlanta area rank in the number of Facebook users? According to the latest report from iStrategyLabs, the area is now No. 4, behind New York, Los Angeles and Chicago. As of June 8, there were 2.937 million Facebook users in the Atlanta area. See the full chart here.

We wrote last year about Atlanta’s phenomenal growth in Facebook users, which moved the area up to second, only behind New York. Now Chicago is experiencing similar growth, closely behind L.A. at No. 3. Chicago’s Facebook users have almost doubled in five months.

iStrategyLabs has been tracking Facebook use since 2007, using data from Facebook’s social ads platform. The agency’s CEO, Peter Corbett, correctly points out that concerns over privacy have not had an impact upon Facebook’s growth, with the U.S. user base growing 21.8% between Jan. 4 and June 8.

Which age group had the highest growth rate? That would be those over 55.

A quick note about our webinar…

OK, I’m going to depart from normal practice here to plug an upcoming webinar in which I’ll be participating. I’m partnering with good friends Tim Morrison and Brownell Landrum on a series of classes devoted to helping writers perfect their craft, build websites for themselves and their books, and market themselves and their writing through social media. Tim is a writing coach and Brownell helps people set up websites using the power of the WordPress platform. And, naturally, I’m the social media coach.

We’re having a free, one-hour webinar next Tuesday, July 13, at 8 p.m Eastern. You can find out more about our classes — and us — at our website. And you can sign up here.