Susan Frances Maria Williams, Baroness Williams of Trafford PC (née McElroy; born 16 May 1967) is a Conservative life peer serving as the Chief Whip of the House of Lords and Captain of the Honourable Corps of Gentlemen-at-Arms. In March 2022 she was made a member of the Privy Council. She held the position of Minister of State for six years, thus she holds the record of being a mid-level minister for the longest time.