Shoreham Redoubt (sometimes called Shoreham Fort) is a defensive structure at the entrance to Shoreham harbour, at the mouth of the River Adur in West Sussex, England. It was planned during the 1850s in a period of alarm about a possible French attack. Construction was completed in June 1857 at a cost of £11,685. The design is similar to that of Littlehampton Fort, which had been built in 1854.