Facebook Demographics Updated

I have written earlier this year about The Graying of Facebook. At that point in time comScore was reporting that more than 50% of Facebook’s users in the U.S. are over 35; the single biggest age demographic in the U.S. on Facebook is now between 35 and 44, and that Facebook’s fastest growing demo is 55-plus.

So if it eight month later and I was wondering if these demographic numbers were still correct. According to Inside Facebook, the fastest-growing group of Facebook users in August 2009 were males ages 13 to 17, whose numbers increased by 14.5%, followed by men ages 45 to 54, rising 12.8%. Among women, the highest growth was in the 45 to 54 and 55 to 65 age ranges, which were up 11.8% and 11%, respectively.

The largest block of Facebook users is still ages 18 to 25, followed by 26-to-34-year-olds. Taken together, those groups made up 51% of the user population. So Facebook has gotten younger this year, with the majority of users (51% ) now under the age of 34.

Facebook users have also become more female with Inside Facebook reporting that 57% of all Facebook users, or about 45.4 million people, are women.

For those of you who are running ad campaigns in Facebook, are you targeting the 18-34 year old female because that appears to be the biggest group on Facebook at the moment.