Keigo Higashino (Japanese: 東野 圭吾, Hepburn: Higashino Keigo) is a Japanese author chiefly known for his mystery novels. He served as the 13th President of Mystery Writers of Japan from 2009 to 2013. Higashino has won major Japanese awards for his books, almost twenty of which have been turned into films and TV series.

One of the most popular and biggest-selling fiction authors in Japan—as well known as James Patterson, Dean Koontz, or Tom Clancy are in the USA—Higashino was born in Osaka. He started writing novels while still working as an engineer at Nippon Denso Co. (presently DENSO). He won the Edogawa Rampo Prize, which is awarded annually to the finest mystery work, in 1985 for the novel Hōkago (After School) at age 27. Subsequently, he quit his job and started a career as a writer in Tokyo. In 1999, he won the Mystery Writers of Japan Inc award for the novel Himitsu (The Secret), which was translated into English by Kerim Yasar.