David Robert Plunket, 1st Baron Rathmore PC, QC (3 December 1838 – 22 August 1919) was an Irish lawyer and Conservative politician.

In 1870, he was elected Conservative Member of Parliament for Dublin University, and was Solicitor General for Ireland under Benjamin Disraeli from 1875 to 1877.

He was then briefly Paymaster General under Disraeli (then known as the Earl of Beaconsfield) in 1880 and was sworn of the Privy Council the same year.

[3] Apart from his political and legal career he was a director of the Suez Canal Company, Chairman of the North London Railway for many years and a director of the Central London Railway at its opening in 1900..[citation needed] In Dublin, Rathmore was a member of the Kildare Street Club.

[4] He died in August 1919, unmarried, at the age of eighty, in the Railway Hotel in Greenore, County Louth[citation needed] and is buried at Putney Vale Cemetery in London.