The Hon. Ashley George John Ponsonby, DL, JP (24 June 1831 – 12 January 1898), was a British Liberal politician.

This article does not cite any sources. (April 2018)

Ponsonby was a younger son of William Ponsonby, 1st Baron de Mauley, third son of Frederick Ponsonby, 3rd Earl of Bessborough. His mother was Lady Barbara Ashley-Cooper, daughter of Anthony Ashley-Cooper, 5th Earl of Shaftesbury.

Ponsonby sat as Member of Parliament for Cirencester between 1852 and 1857 and again between 1859 and 1865. He was also a captain in the Grenadier Guards and a Justice of the Peace and Deputy Lieutenant of Gloucestershire.

Ponsonby married Louisa Frances Charlotte Gordon, daughter of Lord Henry Gordon, in 1857. They had two sons and one daughter. He died in January 1898, aged 66. His wife died in February 1910.

He lived at Prince's Gardens in London and at Heatherfield in Ascot, Berkshire, now Heatherwood Hospital.

• Leigh Rayment's Historical List of MPs

• Hansard 1803–2005: contributions in Parliament by Ashley Ponsonby