Susan Frances Maria Williams, Baroness Williams of Trafford 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.

The Chief Whip of the Conservative Party oversees the whipping system in the party, which is responsible for ensuring that Conservative MPs or members of the House of Lords attend and vote in parliament in the desired way of the party leadership. Chief Whips, of which two are appointed in the party, a member of the House of Commons and a member of the House of Lords, also help to organise their party's contribution to parliamentary business.