James Hay Erskine Wemyss (29 August 1829 – 29 March 1864) was a Scottish Member of Parliament, representing Fife from 1859 until his death.
He was the son of James Erskine Wemyss by his wife Emma, daughter of William Hay, 17th Earl of Erroll.
On 17 April 1855, at All Saints' Church, Knightsbridge, he married Millicent Anne Mary, daughter of the Hon.
She was the granddaughter of Archibald Kennedy, 1st Marquess of Ailsa and of King William IV of the United Kingdom.
This article about a Member of the Parliament of the United Kingdom (since 1801), for a Scottish constituency is a stub.