Thomas Medlycott (1662–1738), of Binfield, Berkshire, and Dublin, Ireland, was a British lawyer who was an Irish attorney general and later Commissioner of Revenue and Excise for Ireland. He was first a Tory and later a Whig politician who sat in the Parliament of Ireland from 1692 to 1738, and in the English House of Commons and British House of Commons between 1705 and 1734.