The South Bishop Lighthouse is a lighthouse on South Bishop Island (also known as Emsger), a small rock approximately 5 miles (8 km) west of St Davids Head in Pembrokeshire, Wales.

In 1831 the traders of the port of Cardigan made an application to build a light, and this was authorised in 1834.

Like many in the UK, it is now monitored from the control centre at Trinity House in Harwich, Essex, England.

A cornice at the top of the tower has iron railings, this is unusual in lighthouses designed by James Walker.

Accommodation for the keepers was provided in two adjoining houses, which were built at the same time as the tower.