In "The Adventures of Tom Sawyer", what is the name of the fictional town?

In "The Adventures of Tom Sawyer," the fictional town is called St. Petersburg.

Mark Twain places Tom Sawyer’s adventures in the imaginary town of St. Petersburg, on the Mississippi River. Although the town is fictional, it is strongly based on Hannibal, Missouri, where Twain spent much of his childhood. The setting combines real places and memories with invented characters and comic adventures.

The town provides the backdrop for Tom’s school troubles, his friendship with Huckleberry Finn, the famous whitewashing episode, and the cave adventure involving Injun Joe. Its location along the Mississippi also shapes the novel’s themes of freedom, danger, exploration, and boyhood independence.

Hannibal is therefore a common source of confusion: it is the real Missouri town that inspired St. Petersburg, not the fictional name used in the novel. Jefferson is not the town’s name, while Maycomb belongs to Harper Lee’s "To Kill a Mockingbird." Twain published "The Adventures of Tom Sawyer" on June 9, 1876, and it became one of his best-known works.