The Pembroke and Tenby Railway was a locally promoted railway in Pembrokeshire, Wales. It was built by local supporters and opened in 1863. The line, now known as the Pembroke Dock branch line, remains in use at the present day. In 1814 a Royal Navy Dockyard had been established at Pembroke Dock. The South Wales Railway had been authorised to build a branch line to Pembroke, but had failed to do so. Their terminus in Neyland was a short ferry crossing from Pembroke Dock.