William Neast (c. 1623 – c. 1670) was an English politician who sat in the House of Commons in 1653 and in 1656.
He matriculated at Magdalen College, Oxford, on 27 August 1638 aged 15 and entered Middle Temple in 1640.
He received a commission as captain of horse on 8 February 1651[1] In 1653, Neast was elected Member of Parliament for Gloucestershire in Barebone's Parliament.
He was re-elected MP for Gloucestershire in 1656 for the Second Protectorate Parliament.
[1] Neast married Elizabeth Atwood of Old Sodbury.