Sir Robert Hamilton, 1st Baronet (died 1703) was an Anglo-Irish official in Ireland.
Hamilton was appointed Custos Rotulorum of County Armagh in 1681. On 19 February 1683 he was created a baronet, of Mount Hamilton in the Baronetage of Ireland, by Charles II of England. In 1685 he was appointed as a member of the Privy Council of Ireland by James II of England.[1]
He married Sarah Hamilton, the only child and heiress of Sir Hans Hamilton, 1st Baronet and Magdalene Trevor. Hamilton was succeeded in his title by his son, Hans Hamilton.[1]