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The Lord Kerry
Born1633
Died1696/97
NationalityIrish
Title20th Baron Kerry
SpouseConstance Long
ChildrenThomas FitzMaurice, 1st Earl of Kerry
Parent(s)Patrick Fitzmaurice, 19th Baron Kerry
Honore Fitzgerald

William FitzMaurice, 20th Baron Kerry (1633–1696/97) was an Irish nobleman, politician, and peer. He was the son of Patrick Fitzmaurice, 19th Baron Kerry and Honore Fitzgerald, daughter of Sir Edmund Fitzgerald, Knight of Cloyne.

He married Constance Long (died 12 October 1685), daughter of William Long, and was the father of Thomas Fitzmaurice, 21st Baron and 1st Earl of Kerry.

Peerage of Ireland Preceded byPatrick Fitzmaurice Baron Kerry 1661–96/97 Succeeded byThomas Fitzmaurice