The title of Earl of Cranbrook was created in 1892 for Lord Cranbrook, a retired Conservative politician.

The Earl bears the subsidiary titles of Viscount Cranbrook (1878) and Baron Medway (1892), both in the Peerage of the UK.

Earls of Cranbrook (1892)

• Gathorne Gathorne-Hardy, 1st Earl of Cranbrook (1814-1906)
• John Stewart Gathorne-Hardy, 2nd Earl of Cranbrook (1839-1911)
• Gathorne Gathorne-Hardy, 3rd Earl of Cranbrook (1870-1915)
• John David Gathorne-Hardy, 4th Earl of Cranbrook (1900-1978)
• Gathorne Gathorne-Hardy, 5th Earl of Cranbrook (b. 1933)