The title of Marquess of Lansdowne was created in the Peerage of Great Britain in 1784 for William Petty, 2nd Earl of Shelburne, the former Prime Minister.

The Marquess holds the subsidiary titles of Earl of Wycombe (1784), Earl of Kerry (1723), Earl of Shelburne (1753), Viscount Calne and Calstone (1784), Viscount Clanmaurice (1723), Viscount Fitzmaurice (1751), Baron Wycombe of Chipping Wycombe (1760), Baron Kerry (1223), and Baron Dunkeron (1751). The subsidiary titles are all in the Peerage of Ireland, except for Earl of Wycombe, Viscount Calne and Calstone and Baron Wycombe of Chipping Wycombe in the Peerage of Great Britain. The title Earl of Wycombe is the courtesy title for the eldest son of the Marquess.

Earls of Shelburne, First Creation (1719)

• Henry Petty, 1st Earl of Shelburne (1675-1751)

Earls of Shelburne, Second Creation (1753)

• John Petty, 1st Earl of Shelburne (1706-1761)
• William Petty, 2nd Earl of Shelburne (1737-1805) (became Marquess of Lansdowne in 1784)

Marquesses of Lansdowne (1784)

• William Petty, 1st Marquess of Lansdowne (1737-1805)
• John Petty-Fitzmaurice, 2nd Marquess of Lansdowne (1765-1809)
• Henry Petty-Fitzmaurice, 3rd Marquess of Lansdowne (1780-1863)
• Henry Petty-Fitzmaurice, 4th Marquess of Lansdowne (1816-1866)
• Henry Petty-Fitzmaurice, 5th Marquess of Lansdowne (1845-1927)
• Henry Petty-Fitzmaurice, 6th Marquess of Lansdowne (1872-1936)
• Charles Petty-Fitzmaurice, 7th Marquess of Lansdowne (1917-1944)
• George Petty-Fitzmaurice, 8th Marquess of Lansdowne (1912-1999)
• Charles Petty-Fitzmaurice, 9th Marquess of Lansdowne (b. 1941)

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