William FitzMaurice, 2nd Earl of Kerry PC (Ire) (1694 – 4 April 1747) was a British Army officer and peer.
He was the eldest son of Thomas Fitzmaurice, 1st Earl of Kerry and Anne Petty.
In 1738, he married Lady Gertrude Lambart, daughter of Richard Lambart, 4th Earl of Cavan, and had a son, Francis Thomas-Fitzmaurice, 3rd Earl of Kerry (1740–1818), and a daughter Anna Maria, who married Maurice FitzGerald, 16th Knight of Kerry.
On 23 June 1716, he was commissioned a captain in the 2nd Regiment of Foot Guards (ranking as lieutenant-colonel in the Army), but resigned in January 1717/8.
His wife, Gertrude, died in 1775 and was buried at St James's Church, Piccadilly, on 17 November.