Thomas Dundas, 2nd Earl of Zetland, KG (5 February 1795 – 6 May 1873), was a British nobleman and politician. Born in Marylebone, London, eldest son of the 1st Earl and his wife Harriet Hale, he was educated at Harrow and Trinity College, Cambridge. In 1818 he was elected Whig Member of Parliament for his father and grandfather's old seat of Richmond, becoming representative for York twelve years later. In 1835 he returned to Parliament as member for Richmond, and four years later succeeded his father as second Earl of Zetland.