St John's Church, Port Ellen is a Category B listed building in Port Ellen, Islay, Argyll and Bute, Scotland.
The memorial stone for the new church was laid by Mrs Ramsay of Kidalton on 1 October 1897. It was built to replace the former churches at Lagavulin as the congregation in Port Ellen had grown. It is a single storey church in the Arts and Crafts style built on a rectangular plan. It was built to the designs of the architect Arthur George Sydney Mitchell.
There are three stained glass windows:
An organ was gifted in 1945 in memory of Pilot Officer Alastair MacTaggart and five others of the parish who were killed on active service during the Second World War. The organ is no longer there as the present organ is an Allen Protege which was installed in August 2001.