Clacton-on-Sea is the largest town in the Tendring peninsula and district in Essex, England, and was founded as an urban district in 1871. It is a seaside resort that saw a peak of tourists in the summer months between the 1950s and 1970s. The town's economy continues to rely significantly on entertainment and day-trip facilities and it is strong in the service sector, with a large retired population. The north-west part of the town has two business/industrial parks.