All services at Kings Langley are operated by London Northwestern Railway.

The typical off-peak service in trains per hour is:[1] During the peak hours, a number of additional services between London Euston, Tring and Bletchley call at the station.

A number of early morning and late evening services are extended beyond Milton Keynes Central to and from Northampton and Birmingham New Street.

The line was fully opened between Euston and Birmingham Curzon Street in September 1838.

Local industrialist John Dickinson used his influence to convince the L&BR to open a station at Kings Langley, and in 1839 Kings Langley railway station opened.