The Wemyss Private Railway was a network of lines, sometimes known as the Wemyss Estate Railway. The lines were a group of mineral and other railways in Fife, Scotland, mainly on the land of the Wemyss family. They were built to connect coal pits to harbours and the railway network, for the use of tenants of the Estate. The Wemyss and Buckhaven Railway was built at the expense of the Wemyss Estate and carried passengers; it was later sold to the North British Railway.

Captain Randolph Gordon Erskine Wemyss was Laird of Wemyss Castle and Chief of Clan Wemyss.