Frederick George Brabazon Ponsonby, 6th Earl of Bessborough (11 September 1815 – 11 March 1895) was a British peer and cricketer.
Ponsonby was born in Marylebone, London, the third son of John Ponsonby, 4th Earl of Bessborough, and his wife Lady Maria Fane. He was educated at Harrow and Trinity College, Cambridge. In 1837 he was admitted to Lincoln’s Inn, and was called to the Bar in 1840. He inherited the earldom on 28 January 1880 when his elder brother died without a male heir.
Lord Bessborough played cricket for both Harrow School and Cambridge University Cricket Club, batting right-handed. Ponsonby was an active player until about 1845, when, due to an arm injury, he continued to play only sporadically. He was a founder of Surrey County Cricket Club and its first vice-president. He was also a founder of the I Zingari nomadic amateur cricket club, and of the Old Stagers amateur theatre company.
Lord Bessborough died at Westminster on 11 March 1895. He never married, and was succeeded in the earldom by his younger brother, Walter.