Tom Ayrton is a fictional character who appears in two novels by French author Jules Verne. He is first introduced as a major character in the novel In Search of the Castaways (1867–1868). He then reappears in a later novel, The Mysterious Island (1874), in which his fate, left unknown at the ending of the previous novel, is resolved, and during the course of which his character undergoes change and achieves a redemption.

In Search of the Castaways is a novel by the French writer Jules Verne, published in 1867–68. The original edition, published by Hetzel, contains a number of illustrations by Édouard Riou. In 1876, it was republished by George Routledge & Sons as a three volume set titled A Voyage Round The World. The three volumes were subtitled South America, Australia, and New Zealand. As often with Verne, English translations have appeared under different names; another edition has the overall title Captain Grant's Children and has two volumes subtitled The Mysterious Document and Among the Cannibals.