It is on the West Coastway Line, 4 miles 30 chains (7.0 km) from Brighton.

[1] Southwick station was constructed by the London and Brighton Railway as one of the original stations on that railway's branchline between Brighton and Shoreham, opening 12th May 1840[2] In 1846 the London and Brighton Railway became part of the London, Brighton & South Coast Railway,[3] which continued until the grouping of 1923 and became part of the Southern Railway until nationalisation in 1948 when it became part of the Southern Region of British Railways.

All services at Southwick are operated by Southern using Class 377 EMUs.

The typical off-peak service in trains per hour is:[4] Additional services call at the station during the peak hours, including services to London Victoria and Littlehampton.

This article on a railway station in South East England is a stub.