Sir John Stepney, 8th Baronet (19 September 1743 – 3 October 1811), of Llanelli, Carmarthenshire, was a Welsh politician who sat in the House of Commons from 1767 to 1788. He was born the first son of Sir Thomas Stepney, 7th Bt., of Llanelly and educated at Christ Church, Oxford, where he matriculated in 1760. He succeeded his father as 8th Baronet in 1772. He was a Member (MP) of the Parliament of Great Britain for Monmouth Boroughs from 1767 to 1788.
