John Bigg (died 1748), of Grafham, Huntingdonshire (now in Cambridgeshire) was a British politician who sat in the House of Commons from 1715 to 1734. Bigg was the only son of John Bigg, MP of Grafham and his wife Frances Pedley, daughter of Sir Nicholas Pedley, MP of Huntingdon and his first wife Lucy Bernard, daughter of Sir Robert Bernard, 1st Baronet, MP of Huntingdon. He was exon (an officer rank) of the Yeomen of the Guard from 1689 to 1718. He succeeded his father to Grafham after 1708.