Sir James Morgan, 4th Baronet of Llantarnam (1643 – 30 April 1718) was the younger son of Sir Edward Morgan, 1st Baronet.
Morgan was born at Llantarnam Abbey, Llanvihangel Llantarnam, Monmouthshire, Wales.
Upon the death of his nephew, Sir Edward, Morgan inherited the baronetcy but not his nephew's estate. His nephew considered him "a violent zealot" for the Church of Rome and was careful to prevent Morgan's succeeding to the estate; it went to Sir Edward's daughter Frances (Morgan) Bray. Morgan was the last to hold the baronetcy, as his surviving heirs migrated to the Thirteen Colonies.
He died in Wales.