Lionel Sackville, 1st Duke of Dorset

His Grace The Duke of Dorset KG PC
1719 portrait by Godfrey Kneller
Lord Lieutenant of Ireland
In office 23 June 1730 – 9 April 1737
Monarch	George II
Preceded by	Earl Granville
Succeeded by	Duke of Devonshire
Lord President of the Council
In office 3 January 1745 – 17 June 1751
Monarch	George II
Preceded by	Earl of Harrington
Succeeded by	Earl Granville
Lord Lieutenant of Ireland
In office 15 December 1750 – 2 April 1755
Monarch	George II
Preceded by	Earl of Harrington
Succeeded by	Marquess of Hartington
Personal details
Born	(1688-01-18)18 January 1688 Dorset, England
Died	10 October 1765(1765-10-10) (aged 77) Knole, Kent
Spouse	Elizabeth Colyear ​ (m. 1709)​
Children	Charles John George Elizabeth Caroline
Parents	Charles Sackville, 6th Earl of Dorset Lady Mary Compton

Lionel Cranfield Sackville, 1st Duke of Dorset KG PC (18 January 1688 – 10 October 1765) was an English peer and politician who served as Lord President of the Council from 1745 to 1751. He also twice served as Lord Lieutenant of Ireland from 1730 to 1737 and again from 1750 to 1755.