George Hobart, 3rd Earl of Buckinghamshire (8 September 1731 – 14 November 1804) was a British peer, styled The Honourable George Hobart from 1733 until 1793.
Hobart was the son of John Hobart, 1st Earl of Buckinghamshire by his second wife, Elizabeth Bristow. He was educated at Westminster School.
Hobart represented the constituencies of St Ives and Bere Alston in the House of Commons from 1754 to 1761 and 1761 to 1780, respectively. He was secretary to the embassy in St Petersburg in 1762, his half-brother John Hobart, 2nd Earl of Buckinghamshire being then ambassador.
He inherited the earldom of Buckinghamshire from his half-brother in 1793. On 29 April 1797, he was commissioned colonel of the 3rd Regiment of Lincolnshire Militia (South Lincolnshire Supplementary Militia), becoming a colonel in the regular army when his regiment was embodied on 12 January 1799. He died in 1804 and was succeeded by his son Robert, who had already entered the House of Lords in 1798 by a writ of acceleration as Baron Hobart.
Hobart married Albinia Bertie, illegitimate daughter of Lord Vere Bertie, in May 1757. They had eight children: