From a colleague:
Harris Poll: http://www.harrisinteractive.com/harris_poll/index.asp?PID=581
According to Table 7, belief in Intelligent Design increases with increasing education. (Ditto for evolution.)
According to Table 8, belief in ID is more common among Democrats than Republicans. (Ditto for evolution.)
According to Table 9, belief in ID is more common in the Northeastern and Western USA and less common in the Southern and Midwestern USA. (Ditto for evolution.)
Also, taking into account this report: http://news.bbc.co.uk/1/hi/sci/tech/4648598.stm
Belief in ID is more common in the UK than in the USA (17% vs 10%). (Ditto for evolution.)