Gallup poll shows that 39% of people in the U.S. believe in the theory of evolution. Other graphs on the page show that level of education is correlated with a belief in evolution (belief drops to 24% among frequent church attenders), and 44% of people don't know which scientific theory Charles Darwin is associated with.
In short, the Pastafarians are winning. Hurray!
On Darwin’s Birthday, Only 4 in 10 Believe in Evolution