Thomas Robinson, 2nd Baron Grantham PC (30 November 1738 – 20 July 1786) was a British statesman.

[1][2] Grantham entered parliament as member for Christchurch in 1761,[3] and succeeded to the peerage, because of his father's death, in 1770.

[4] From 1780 to 1782 Grantham was President of the Board of Trade, and from July 1782 to April 1783 Foreign Secretary under Lord Shelburne.

[1] In 1780 Lord Grantham married Lady Mary Yorke (1757–1830), younger daughter of Philip Yorke, 2nd Earl of Hardwicke by his wife Lady Jemima Campbell (1723–1797), suo jure 2nd Marchioness Grey, a daughter of John Campbell, 3rd Earl of Breadalbane and Holland by his wife Lady Amabel Grey, a daughter of Henry Grey, 1st Duke of Kent (1671–1740).

As she had no male heirs, the title later became extinct upon her own death in 1797, but in 1816 her elder daughter Lady Amabel Yorke (1750–1833) (wife of Alexander Hume-Campbell, Lord Polwarth) was created Countess de Grey in her own right.