Check out this Goodreads infographic about who loves Twilight the most.
The pattern is, intense Twilight love in the south and midwest, shading gradually to “meh” on the coasts. The red/blue split looks a lot like red/blue voting results, which is kind of interesting. It could be driven by the same demographic — people from more concentrated urban areas are less thrilled about Twilight.
I’d like to see a more detailed zip code map, where you could see if there’s an isolated pocket of Twilove in Forks.