Chesham is the northernmost London Underground station.
The station is the northern terminus of the Metropolitan line’s Chesham branch. It serves the Buckinghamshire town of Chesham, north-west of central London, and lies beyond Amersham on the Underground network’s northern edge.
Chesham opened on 8 July 1889 as part of the Metropolitan Railway’s extension from Chalfont Road. The branch was originally intended to continue farther north, but Chesham became its terminus. The station remains a single-platform terminus, an unusual arrangement on the modern Underground.
A common mix-up is to identify Cockfosters or Edgware as the northernmost station because both are prominent termini. However, the Metropolitan line reaches farther north than the Piccadilly and Northern lines. Amersham is also nearby and is the western terminus of the Metropolitan line, but Chesham is farther north.