Barnaby Rudge: A Tale of the Riots of Eighty (commonly known as Barnaby Rudge) is a historical novel by British novelist Charles Dickens. Barnaby Rudge was one of two novels (the other was The Old Curiosity Shop) that Dickens published in his short-lived (1840–1841) weekly serial Master Humphrey's Clock. Barnaby Rudge is largely set during the Gordon Riots of 1780.

Barnaby Rudge was the fifth of Dickens' novels to be published. It had originally been planned to appear as his first, but changes of publisher led to many delays, and it first appeared in serial form in the Clock from February to November 1841.

Gathered round the fire at the Maypole Inn, in the village of Chigwell, on an evening of foul weather in the year 1775, are John Willet, proprietor of the Maypole, and his three cronies. One of the three, Solomon Daisy, tells an ill-kempt stranger at the inn a well-known local tale of the murder of Reuben Haredale which had occurred 22 years ago that very day. Reuben had been the owner of the Warren, a local estate which is now the residence of Geoffrey, the deceased Reuben's brother, and Geoffrey's niece, Reuben's daughter Emma Haredale. After the murder, Reuben's gardener and steward went missing and were suspects in the crime. A body was later found and identified as that of the steward, so the gardener was assumed to be the murderer.

Joe Willet, son of the Maypole proprietor, quarrels with his father because John treats 20-year-old Joe as a child. Finally having had enough of this ill treatment, Joe leaves the Maypole and goes for a soldier, stopping to say goodbye to the woman he loves, Dolly Varden, daughter of London locksmith Gabriel Varden.

Meanwhile, Edward Chester is in love with Emma Haredale. Both Edward's father, John Chester, and Emma's uncle, the Catholic Geoffrey Haredale – these two are sworn enemies – oppose the union after Sir John untruthfully convinces Geoffrey that Edward's intentions are dishonourable. Sir John intends to marry Edward to a woman with a rich inheritance, to support John's expensive lifestyle and to pay off his debtors. Edward quarrels with his father and leaves home for the West Indies.

Barnaby Rudge, a simpleton, wanders in and out of the story with his pet raven, Grip. Barnaby's mother begins to receive visits from the ill-kempt stranger, whom she feels compelled to protect. She later gives up the annuity she had been receiving from Geoffrey Haredale and, without explanation, takes Barnaby and leaves the city hoping to escape the unwanted visitor.