Baron Sackville, of Knole in the County of Kent, is a title in the Peerage of the United Kingdom.

It was created in 1876 for the Honourable Mortimer Sackville-West, with remainder, failing heirs male of his body, to his younger brothers the Hon.

On the death of the latter's cousin, Charles Sackville-Germain, 5th Duke of Dorset, in 1845, the dukedom and its subsidiary titles became extinct and the Sackville estates passed through Elizabeth to the West family who assumed the additional surname of Sackville by Royal licence.

By arrangement, Mortimer Sackville-West succeeded to a substantial part of the estates, including Knole in Kent, which is still the seat of the Barons Sackville.

He is the son of Hugh Rosslyn Inigo Sackville-West, younger brother of the sixth Baron.