Shoreham Redoubt (also known as Shoreham Fort or Kingston Redoubt) is a historical military defensive structure and scheduled monument at the entrance to Shoreham harbour, at the mouth of the River Adur in West Sussex, England. It was planned in the 1850s during a period of political alarm in the United Kingdom. Construction of the fort was completed in June 1857 at a cost of £11,685 (equivalent to approximately £1.2 million today). The design is similar to that of Littlehampton Fort, which had been built in 1854.