Viscount Knollys (/noʊlz/), of Caversham in the County of Oxford, is a title in the Peerage of the United Kingdom.

He had been previously created Baron Knollys, of Caversham in the County of Oxford, on 21 July 1902.

As of 2023[update] the titles are held by the latter's grandson, the fourth Viscount, who succeeded in 2023.

The third Viscountess Knollys (d. 2022) was a sister of Baron Farnham: she served as Vice Lord-Lieutenant of Norfolk.

[1] The family seat is Bramerton Grange, near Norwich, Norfolk.