The official website of J.K. Rowling
Pottermore
A unique online Harry Potter experience from J.K. Rowling
Ravenclaw Reads
Pottermore basics and more from a fellow Ravenclaw :)
MuggleNet
"The World's #1 Harry Potter Site"
The Leaky Cauldron
"The Most Trusted Name in Potter"
Harry Potter Fan Zone
J.K. Rowling 'Fan Site Award' winner
Harry Potter Wiki
A database for J.K. Rowling's Harry Potter books and movies, that anyone can edit
The Wizarding World of Harry Potter
Experience the world of Harry Potter for real at Universal Orlando