The Adventures of Tom Sawyer (also simply known as Tom Sawyer) is a novel by Mark Twain published on June 9, 1876, about a boy, Tom Sawyer, growing up along the Mississippi River. It is set in the 1830s-1840s in the town of St. Petersburg, which is based on Hannibal, Missouri, where Twain lived as a boy. In the novel, Sawyer has several adventures, often with his friend Huckleberry Finn.

Originally a commercial failure, the book ended up being the best-selling of Twain's works during his lifetime. Though overshadowed by its 1885 sequel, Adventures of Huckleberry Finn, the book is considered by many to be a masterpiece of American literature. It is alleged by Mark Twain to be one of the first novels to be written on a typewriter.

Orphan Tom Sawyer (around 12 to 13 years old) lives with his Aunt Polly and his half-brother Sid in the town of St. Petersburg, Missouri, sometime in the 1830s-1840s. He frequently skips school to play or go swimming. When Polly catches him sneaking home late on a Friday evening and discovers that he has been in a fight, she makes him whitewash her fence the next day as punishment.