William West, 3rd Earl De La Warr

Earldom De La Warr
Quarterly: 1st, argent a fess dancettée sable (for West); 2nd: azure three leopard's heads reversed jessant de lys or (for Cantelupe); 3rd: gules crusilly and a lion argent (for La Warr); 4th, quarterly or and gules a bend vair (for Sackville)
Creation date	18 March 1761
Monarch	George III
Peerage	Peerage of Great Britain
First holder	John West, 1st Earl De La Warr
Present holder	William Sackville, 11th Earl De La Warr
Heir apparent	William Sackville, Baron Buckhurst
Subsidiary titles	Viscount Cantelupe Baron De La Warr Baron Buckhurst
Former seat(s)	Bourn Hall, Cambridgeshire
Armorial motto	Jour de ma vie ("Day of my life")

Earl De La Warr /ˈdɛləwɛər/ is a title in the Peerage of Great Britain. It was created in 1761 for John West, 7th Baron De La Warr.

The Earl holds the subsidiary titles of Viscount Cantelupe (1761) in the Peerage of Great Britain, Baron De La Warr (1572) in the Peerage of England, and Baron Buckhurst, of Buckhurst in the County of Sussex (1864) in the Peerage of the United Kingdom. The barony De La Warr is of the second creation; however, it bears the precedence of the first creation, 1299, and has done so since shortly after the death of William West, 1st Baron De La Warr.

The family seat is Buckhurst Park, near Withyham, Sussex.

The name de La Warr is from Sussex and of Anglo-Norman origin. It came probably from La Guerre, a Norman lieu-dit. This toponymic could derive from the Latin word , from the Breton or from the Late Latin warectum (fallow). The toponyms Gara, Gaire also appear in old texts cited by Lucien Musset, where the word ga(i)ra means gore. It could also be linked with a patronymic from the Old Norse .