Clacton-on-Sea railway station is one of the two eastern termini of the Sunshine Coast Line, a branch of the Great Eastern Main Line, in the East of England, serving the town of Clacton-on-Sea, Essex. It is 69 miles 56 chains (112.17 km) down the line from London Liverpool Street. Its three-letter station code is CLT. The preceding station on the line is Thorpe-le-Soken.

The Sunshine Coast Line is the current marketing name of what originally was the Tendring Hundred Railway Line, a branch off the Great Eastern Main Line in the East of England. It links Colchester to the seaside resorts of Clacton-on-Sea and, via a branch, Walton-on-the-Naze. The line is part of the Network Rail Strategic Route 7, SRS 07.08, and is classified as a London & South East commuter line. Passenger services on the line are currently operated by Greater Anglia.