The Hayling Island branch was a short railway branch line in Hampshire, England, that connected a station on Hayling Island with the main line network at Havant. It was built by the Hayling Railway; at first the company planned to run it along a new embankment built along tidal mudflats, but this proved impractical. The line was opened along firm ground in 1867. In the early 1960s large numbers of holidaymakers were carried on the line in high season, but heavy expenditure on repairs to the viaduct would have been necessary, and the cost was unsupportable; the line closed in 1963.