
Northolt was recorded as nord healum in 960 and as Northala in the Domesday Book and the name is derived from the Old English nord, 'north' and health, 'heath' - it means 'the north heath' or 'angle of land' in contrast to Southall. Known as Northolt by 1610.
The station was opened for Underground trains as NORTHOLT on 21 November 1948, replacing a halt of the same name, but on a different site, which had been opened by the GWR on 1 May 1907.