Welling is a town in South East London, England, in the London Borough of Bexley, 1.5 miles (2.4 km) west of Bexleyheath, 4 miles (6.4 km) southeast of Woolwich and 10.5 miles (16.9 km) of Charing Cross. It was part of Kent prior to the creation of Greater London in 1965.

The London Borough of Bexley is a London borough in south-east London, forming part of Outer London. It has a population of 248,287. The main settlements are Sidcup, Erith, Bexleyheath, Crayford, Welling and Old Bexley. The London Borough of Bexley is within the Thames Gateway, an area designated as a national priority for urban regeneration. The local authority is Bexley London Borough Council.