* Annual estimated passenger usage based on sales of tickets in stated financial year(s) which end or originate at Letchworth Garden City from Office of Rail Regulation statistics. Methodology may vary year on year.
The first station known as Letchworth Garden City was opened in 1903, with a restricted service; it gained a full passenger service on 15 April 1905. On 18 May 1913, this station was replaced by a new station on a different site. The new station was built in 1912, in the Arts and Crafts style, and has since been Grade II listed.
The station was originally intended to have two island platforms, giving a total of four platforms. However, since its opening only two platforms have been used. It was known from October 1937 as Letchworth, until it regained its current name on 11 June 1999 following a refurbishment scheme.
The platforms were extended initially for 8 carriages, and further extended in December 2011 for 12 carriage trains.
To the north of the station are the sidings where trains starting or terminating at Letchworth are cleaned and stabled.
Daily there are two trains per hour towards London King's Cross and two per hour northbound towards Cambridge. There is also a Monday to Friday hourly service via Hertford North to London Moorgate, which in the evenings runs to London King's Cross instead of Moorgate.