The title Marquess of Ailesbury was created in the Peerage of the United Kingdom in 1821 for Charles Brudenell-Bruce, 2nd Earl of Ailesbury.

Lord Ailesbury holds the subsidiary titles of Earl of Cardigan (English, 1661), Earl of Ailesbury (Great Britain, 1776), Earl Bruce, of Whorlton in the County of York (UK, 1821), Viscount Savernake, of Savernake Forest in the County of Wilts (UK, 1821), Baron Brudenell, of Stanton Wyvill in the County of Leicester (English, 1628), and Baron Bruce, of Tottenham in the County of Wiltshire (Great Britain, 1746). He is also an English baronet, styled "of Deene in the County of Northampton". The English titles were inherited by the second Marquess in 1868 from a different branch of the family.

Lord Ailesbury is also Hereditary Warden of Savernake Forest.

The heir apparent to the marquessate normally bears the courtesy title Earl of Cardigan, whose heir apparent subsequently holds the title Viscount Savernake.

Earls of Ailesbury, First Creation (1664)

• Robert Bruce, 2nd Earl of Elgin, 1st Earl of Ailesbury (1627-1685)
• Thomas Bruce, 3rd Earl of Elgin, 2nd Earl of Ailesbury (1656-1741)
• Charles Bruce, 4th Earl of Elgin, 3rd Earl of Ailesbury (1682-1747)

Barons Bruce (1746)

• Charles Bruce, 4th Earl of Elgin, 3rd Earl of Ailesbury, 1st Baron Bruce (1682-1747)
• Thomas Brudenell-Bruce, 2nd Baron Bruce (1739-1814) (became Earl of Ailesbury in 1776)

Earls of Ailesbury, Second Creation (1776)

• Thomas Brudenell-Bruce, 1st Earl of Ailesbury (1739-1814)
• Charles Brudenell-Bruce, 2nd Earl of Ailesbury (1773-1856) (became Marquess of Ailesbury in 1821)

Marquesses of Ailesbury (1821)

• Charles Brudenell-Bruce, 1st Marquess of Ailesbury (1773-1856)
• George William Frederick Brudenell-Bruce, 2nd Marquess of Ailesbury (1804-1878)
• Ernest Augustus Charles Brudenell-Bruce, 3rd Marquess of Ailesbury (1811-1886)
• George William Thomas Brudenell-Bruce, 4th Marquess of Ailesbury (1863-1894)
• Henry Augustus Brudenell-Bruce, 5th Marquess of Ailesbury (1842-1911)
• George William James Chandos Brudenell-Bruce, 6th Marquess of Ailesbury (1873-1961)
• Chandos Sydney Cedric Brudenell-Bruce, 7th Marquess of Ailesbury (1904-1974)
• Michael Sydney Cedric Brudenell-Bruce, 8th Marquess of Ailesbury (b. 1926)

Heir Apparent: David Michael James Brudenell-Bruce, Earl of Cardigan

Lord Cardigan's Heir Apparent: Thomas James Brudenell-Bruce, Viscount Savernake