John Frederick Lambton, 5th Earl of Durham (7 October 1884 – 4 February 1970), briefly styled Viscount Lambton between 1928 and 1929, was a British peer. Through his sister Lilian, he was an uncle of future Prime Minister Sir Alec Douglas-Home. Lord Durham is best remembered for the donation of Penshaw Monument to the National Trust.
Durham was born on 7 October 1884, the son of Frederick Lambton, 4th Earl of Durham and his wife Beatrix Bulteel.
Durham was educated at Eton College. He fought in the First World War as a Captain in the 3rd/7th Battalion, Northumberland Fusiliers and was wounded. He succeeded to the earldom and subsidiary titles on the death of his father on 31 January 1929.
Durham died on 4 February 1970, aged 85.
Durham was married firstly on 12 November 1919 to Diana Mary Farquhar (born 19 July 1901, died 28 August 1924). They had two sons:
After the death of his first wife, Durham was married secondly on 4 March 1931 to Hermione Bullough, daughter of Sir George Bullough, 1st Baronet. They had one son: