David Bourget and David Chalmers have released the results of the largest survey of professional philosophers ever conducted. Some interesting results:
72.8% atheism
14.6% theism
12.5% other
49.8% naturalism
25.8% non-naturalism (but not necessarily supernaturalism)
24.2% other
Of course, quite what any of this shows re the truth of any of these beliefs, if anything, can be debated....
nb see this earlier post.