(George Frederick) D'Arcy Lambton, 2nd Earl of Durham (5 September 1828 – 27 November 1879), styled Viscount Lambton from 1833 to 1840, was a British peer.
Lambton was born on 5 September 1828 at Copse Hill, Wimbledon, the second (and later eldest surviving) son of John Lambton, 1st Baron (later Earl of) Durham, and his second wife Lady Louisa Elizabeth, daughter of Charles Grey, 2nd Earl Grey. He was baptised at St Mary's Church, Wimbledon on 29 September that year. He was known by his third name of D'Arcy, the maiden name of an ancestor whose inheritance included land surrounding what would later become Lambton Castle. Aged 11, Lambton inherited the earldom of Durham when his father died in 1840. His mother died from a severe cold just over a year later. He attended Cambridge University in 1846.
Lord Durham served as Lord-Lieutenant of County Durham from 1854 to 1879.
On 19 July 1877, the Earl of Durham signed a document giving an acre of his land to be used for the construction of a church in the newly formed parish of Fatfield.Fatfield, St George's church, Washington was completed in 1879 and was built in the Early English Gothic style.
Lord Durham married Lady Beatrix Frances Hamilton, daughter of James Hamilton, 1st Duke of Abercorn, on 23 May 1854 at St George's, Hanover Square. They had thirteen children:
The Countess of Durham died on 21 January 1871, aged 35, and just three days after the birth of her youngest child. In 1876, Lord Durham had his right eye removed after he was shot by his son, Charles, while on a shooting party. Lord Durham died at 6:05pm on 27 November 1879 at his town house on Hill Street in Mayfair, aged 51, and was succeeded in the earldom by his eldest twin son John. The Earl and Countess and some of their children are buried in St Barnabas' Church, Bournmoor, which the Earl had built at his own expense when the parish was created in 1867.