William Mills (10 November 1750 – 20 March 1820) was a British Member of Parliament and Director, East India Company.
He inherited Warden's Hall, High Ongar, Essex from his uncle William in 1782 and succeeded his father in 1791.
He was elected MP for St Ives in 1790, sitting until 1796 and for Coventry for 1805 to 1812.
[3] On 7 April 1786, Mills married Elizabeth Digby (1758–1828), the daughter of Hon.
Together, they had six sons and three daughters,[3] including: Mills died on 20 March 1820, leaving his sons John and Charles, £10,000 each, as well as William's brother, Charles's estate.