Frances Mackenzie, Countess of Seaforth

The Right Honourable
The Dowager Countess of Seaforth
BornLady Frances Herbert
1659 (1659)
Montgomeryshire, Wales
Died18 December 1732(1732-12-18) (aged 72–73)
Paris, France
SpouseKenneth Mackenzie, 4th Earl of Seaforth
IssueWilliam Mackenzie, 5th Earl of Seaforth
Lady Mary Sempill
ParentsWilliam Herbert, 1st Marquess of Powis
Lady Elizabeth Somerset

Frances Mackenzie, Dowager Countess of Seaforth (née Herbert; 1659 – 18 December 1732), was a Welsh-born Scottish noblewoman and wife of Kenneth Mackenzie, 4th Earl of Seaforth.