Latest Data on Facebook's US Growth by Age and Gender - October 1, 2009

We’ve been keeping track of Facebook’s self-reported demographic statistics on the US market for a while now, and here’s the latest update for October 1, 2009. While Facebook says these stats, provided to advertisers, are not necessarily real time, they do give us a sense of how Facebook is growing.

On the whole, Facebook’s US audience grew by 8.6% in September to 88.3 million uniques (compare to latest data from Quantcast, Compete, and comScore). Here’s how Facebook’s gender and sex numbers break down as of today:

(Note: about 5% of users do not report either gender or age, and are not included in this chart.)

Where did the growth come from? Primarily from younger audiences.

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