Baron Cobbold, of Knebworth in the County of Hertford, is a title in the Peerage of the United Kingdom.

[3] In 1961, he assumed by deed poll the additional surname of Lytton, which was the maiden name of his mother Lady Hermione Lytton, through whom the family inherited Knebworth House.

[4][5] From 2000 he was one of the ninety elected hereditary peers who remained in the House of Lords after the passing of the House of Lords Act 1999, and sat as a cross-bencher until his retirement in 2014.

Several other members of the Cobbold family have also gained distinction.

The heir apparent is the present holder's son, the Hon.