Frederick Edward Gould Lambart, 9th Earl of Cavan KP, PC, DL, JP (21 October 1839 – 14 July 1900) styled Viscount Kilcoursie until 1887, was an Anglo-Irish Royal Navy officer and Liberal politician.

Kilcoursie was the eldest son of Frederick Lambart, 8th Earl of Cavan, and his wife, Hon.

[2] In February 1886 he was sworn of the Privy Council[3] and appointed Vice-Chamberlain of the Household in William Ewart Gladstone's Liberal Government,[4] which he remained until the administration fell in July of the same year.

[8] Lord Cavan died at Wheathampstead, Hertfordshire, in July 1900, aged 60, and was succeeded by his eldest son, Frederick.

The Countess of Cavan died at Wheathampstead House, Hertfordshire, in August 1905, aged 59.