Lewes Bonfire or Bonfire, for short, describes a set of celebrations held in the town of Lewes, Sussex that constitute the United Kingdom's largest and most famous Bonfire Night festivities, with Lewes being called the bonfire capital of the world.

Always held on 5 November (unless the 5th falls on a Sunday, in which case it's held on Saturday 4th), the event not only marks Guy Fawkes Night - the date of the uncovering of the Gunpowder Plot in 1605 - but also commemorates the memory of the seventeen Protestant martyrs from the town burned at the stake for their faith during the Marian Persecutions.

Lewes is home to the largest and most celebrated of the festivities in the Sussex bonfire tradition. There are seven societies putting on five separate parades and firework displays on the 5th, and this can mean 3,000 people taking part in the celebrations, and up to 80,000 spectators attending in the small market town with a permanent population of just under 16,000.