Sir William Champion de Crespigny, 2nd Baronet (1 January 1765 – 28 December 1829) was a British politician who sat in the House of Commons between 1818 and 1826.

[1][6] While in the House, he "presented petitions urging government to address agricultural distress", "spoke in support of the enfranchisement of Leeds", "presented a London merchants' petition demanding better protection from foreign competition and attacking the East India Company's monopoly, the level of military expenditure and the corn laws", and "endorsed a petition against the 'obnoxious' Irish window tax and demanded its abolition both there and in England" in 1822.

[1] At the end of the 1826 term, De Crespigny, who had been widowed since December 1825, "retired on account of ill health, citing 'palsy and apoplexy' in his parting constituency address and likening himself to a dying swan on the hustings.

As his eldest surviving son predeceased him, baronetcy and entrusted family properties passed to his grandson, Claude.

He was eccentric enough to bribe hangman James Berry into accepting him as assistant executioner on the occasion of a triple hanging in Carlisle on 8 February 1886.