The Son of Tarzan is a novel by American writer Edgar Rice Burroughs, the fourth in his series of books about the title character Tarzan. It was written between January 21 and May 11, 1915, and first published in the magazine All-Story Weekly as a six-part serial from December 4, 1915 to January 8, 1916. It was first published in book form by A. C. McClurg & Co. in March 1917 and has been reprinted numerous times since by various publishers.

In this novel, for the first and only time in the Tarzan series, the main character is not Tarzan himself but his son Jack, who becomes known as Korak, first introduced (as a baby) in the earlier novels The Eternal Lover (1914/15) and The Beasts of Tarzan (1914). Korak would return as a supporting character in the later novels Tarzan the Terrible (1921), Tarzan and the Golden Lion (1922/23) and Tarzan and the Ant Men (1924).

The story begins 10 years after the conclusion of The Beasts of Tarzan. During the past decade, Alexis Paulvitch, who had escaped Tarzan at the end of the last novel, has lived a hideous life of abuse and disease among tribal people in Africa. Now he is discovered by a European ship and taken aboard. In the months that followed, Paulvitch encounters the ape, Akut, (whom Tarzan had befriended in that previous story) at one of the ship's stops. Because of Akut's interactions with Tarzan, he was unafraid of white men, and Paulvitch, unaware of the previous relationship, saw an opportunity to make some money. He took Akut to London and began displaying him publicly.