George Robert Hobart-Hampden, 5th Earl of Buckinghamshire (1 May 1789 – 1 February 1849), known as George Hobart until 1816, was a British peer and politician.

Buckinghamshire was the son of the Hon. George Vere Hobart, second son of George Hobart, 3rd Earl of Buckinghamshire. His mother was Jane Cattaneo, daughter of Horatio Cattaneo, while Robert Hobart, 4th Earl of Buckinghamshire, was his uncle.^[1]

He was educated at Westminster School in London from 1803 to 1807,^[1] Christ Church, Oxford in 1809, and at Lincoln's Inn in 1810.^[2]

Lord Buckinghamshire sat briefly as Member of Parliament for Mitchell (also known as the St Michaels constituency) from 1812 to 1813.^[3] In 1813, he served as Capt. of the Stamford Regiment Lincolnshire Militia.^[2]

In 1816 he succeeded his uncle in the earldom and entered the House of Lords. He also became the 9th Baronet Hobart and 5th Baron Hobart. In 1824 he assumed, by Royal licence, the additional surname of Hampden to inherit the Buckinghamshire estates of his kinsman, John Hampden-Trevor, 3rd Viscount Hampden.^[2]

On 3 May 1819, Lord Buckinghamshire married Anne Glover Pigot, an illegitimate daughter of Sir Arthur Piggott, at St Giles in the Fields Church in London. They had no children.^[1]

He died in February 1849, aged 59, and was succeeded by his younger brother, the Reverend Augustus Edward Hobart-Hampden.^[4] Lady Buckinghamshire later remarried and died in May 1878.^[1]