Which Harry Potter novel did J.K. Rowling publish in 2003?

J.K. Rowling published Harry Potter and the Order of the Phoenix in 2003.

The fifth Harry Potter novel was released in the United Kingdom on 21 June 2003. It is the longest book in the main series by word count and follows Harry’s fifth year at Hogwarts. The story includes the Ministry of Magic’s refusal to accept Voldemort’s return, the appointment of Dolores Umbridge, and the formation of Dumbledore’s Army.

The title refers to the revived Order of the Phoenix, a group formed to oppose Voldemort. The novel’s conflict is not limited to magical combat: it also concerns propaganda, institutional denial, and students organizing to learn defensive magic.

The book is often confused with the fourth or sixth installment because all three involve major changes in the wizarding conflict. Goblet of Fire was published in 2000, while Half-Blood Prince followed in 2005. Order of the Phoenix is specifically the 2003 fifth novel.