The demographics of American Pinterest users

"Pinterest’s growth over the past six months has been nothing short of astounding. We’ve noted this before, but some new data today from Hitwise confirms the trend. Last week, Pinterest attracted 11 million visits, up almost 40-fold from just six months ago. Pinterest is now one of the top 10 social networking sites Hitwise tracks.
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Visitors tend to be female (58 percent), between 25 and 44 years old (59 percent). A lot of the visitors are from California and Texas, but Pinterest has mainstream appeal distributed across the middle of the country, with strong activity coming from Alabama, Tennessee, and Utah."

Source:  Data from Hiitwise, reported by TechCrunch, 22nd December 2011