Lyme Regis ( //) is a coastal town in West Dorset, England, situated 25 miles west of Dorchester and 25 miles (40 km) east of Exeter. The town lies in Lyme Bay, on the English Channel coast at the Dorset–Devon border. It is nicknamed "The Pearl of Dorset." The town is noted for the fossils found in the cliffs and beaches, which are part of the Heritage Coast—known commercially as the Jurassic Coast—a World Heritage Site. The harbour wall, "The Cobb", features in Jane Austen's novel Persuasion, and in the film and novel, The French Lieutenant's Woman, by local writer John Fowles.
The town's population at the most recent census was 4,406, 45% of whom were retired.