Derby is a locality on the lower Fraser River in northwestern Langley.

The site of the original Fort Langley, established in 1827 by the Hudson's Bay Company, and was the first post established in Coast Salish territory.

In 1858, when the Royal Engineers arrived, they built barracks in Derby.

[2] All signs of the town and fort have since disappeared, with the locality now only an intersection in the middle of farmland.

The name is believed to be derived from that of the British Prime Minister in 1858, Edward Geoffrey Smith-Stanley, 14th Earl of Derby (1799–1869).