Rowling chronicled the adventures of the fictional wizard-in-training in seven blockbuster novels, which have spawned eight films.
She has said in the past she wrapped up the saga with her seventh book.
However, at Thursday's London premiere of the final movie, "Harry Potter and the Deathly Hallows: Part 2," Rowling hinted she might have more stories to tell about Harry and his friends.
The Daily Telegraph quoted Rowling as telling fans she has no immediate plans to revisit the world she created for "Potter," but would "never say never."
"It is my baby and if I want to bring it out to play again, I will," she added.