The 49-year-old author addressed the issue of why there were no Jewish students at the school in her books during a Twitter session, reported People magazine.
She explained that this was incorrect, that Anthony Goldstein, a Ravenclaw pupil, was in fact a Jewish wizard.
The 'Harry Potter' series author took to Twitter to set the record straight.
"If Harry Potter taught us anything it's that no one should live in a closet," she tweeted along with a picture.
She added that the only people she didn't imagine at Hogwarts were 'Wiccans' and also explained the reason behind it.
"It's a different concept of magic to the one laid out in the books, so I don't really see how they can co-exist," Rowling said.
Rowling has released new writings on the Pottermore website, including a back story to Dolores Umbridge and new stories concerning Draco Malfoy for the Christmas event, which started on December 12.