20 Forthlin Road is a National Trust property in Allerton in south Liverpool, Merseyside, England. It is the house in which Paul McCartney lived for several years before he rose to fame with the Beatles, and it is labelled by the National Trust as "the birthplace of the Beatles". It was also the home of his brother Mike and the birthplace of the trio the Scaffold, of which Mike was a member.

The National Trust is a charity and membership organisation for heritage conservation in England, Wales and Northern Ireland. In Scotland, there is the separate and independent National Trust for Scotland.