Heathrow or Heath Row was a wayside hamlet along a minor country lane called Heathrow Road in the ancient parish of Harmondsworth, Middlesex, England, on the outskirts of what is now Greater London. Its buildings and all associated holdings were demolished, along with almost all of the often grouped locality of The Magpies in 1944 for the construction of the new London Airport, which would later assume the name of Heathrow after 1967.

Harmondsworth is a village in the London Borough of Hillingdon in the county of Greater London with a short border to the south onto London Heathrow Airport and close to the Berkshire county border. The village has no railway stations, but adjoins the M4 motorway and the A4 road. Harmondsworth was in the historic county of Middlesex until 1965. It is an ancient parish that once included the large hamlets of Heathrow, Longford and Sipson. Longford and Sipson have modern signposts and facilities as separate villages, remaining to a degree interdependent such as for schooling. The Great Barn and parish church are medieval buildings in the village. The largest proportion of land in commercial use is related to air transport and hospitality. The village includes public parkland with footpaths and abuts the River Colne and biodiverse land in its Regional Park to the west, once the grazing meadows and woodlands used for hogs of Colnbrook.