The title of Earl of Malmesbury was created in the Peerage of Great Britain in 1800.

The Earl holds the subsidiary titles of Viscount FitzHarris, of Hurn Court in the County of Southampton (1800), and Baron Malmesbury, of Malmesbury in the County of Wiltshire (1788), in the Peerage of Great Britain.

Earls of Malmesbury (1800)

• James Harris, 1st Earl of Malmesbury (d.1820)
• James Edward Harris, 2nd Earl of Malmesbury (1778-1841)
• James Howard Harris, 3rd Earl of Malmesbury (1807-1889)
• Edward James Harris, 4th Earl of Malmesbury (d. 1899)
• James Edward Harris, 5th Earl of Malmesbury (d. 1950)
• William James Harris, 6th Earl of Malmesbury (d. 2000)
• James Carleton Harris, 7th Earl of Malmesbury (b. 1946)