Robert Dundas may refer to: Robert Dundas (died 1726), Scottish judge and politician Robert Dundas of Arniston, the Elder (1685–1753), his son, Scottish judge Robert Dundas of Arniston, the younger (1713–1787), Scottish judge Robert Dundas of Arniston (1758–1819), Scottish judge Sir Robert Dundas, 1st Baronet (1761–1835), Scottish landowner and lawyer Robert Dundas, 2nd Viscount Melville (1771–1851), Scottish nobleman Robert Dundas, 4th Viscount Melville, Scottish nobleman Robert Nisbet-Hamilton, born Robert Dundas Sir Robert Lawrence Dundas (1780–1844), British Army officer and politician