The Sunken World is a science fiction novel by American writer Stanton A. Coblentz.

The novel originally appeared in the Summer 1928 issue of the magazine Amazing Stories Quarterly.

It was Coblentz's first published science fiction novel.

The novel concerns Anton Harkness, the commander of an American submarine in World War I which is caught in a whirlpool which drags it to the bottom of the sea where it collides with a glass dome.

The crew are rescued by the Atlanteans who live beneath the dome.