The A118 is a road in east London, England which links Bow Interchange with Gallows Corner in Romford via Stratford and Ilford.

The section from Bow Interchange to Gallows Corner formed the original route of the A12 until the designation was transferred to the Eastern Avenue soon after the latter opened in 1925.

Parts of the route have an even older pedigree, forming the Camulodunum (Colchester) to Londinium (London) extension of the Pye Road.

Thus 70 years after the Eastern Avenue was built, the A12 finally by-passed the whole of the A118, unlike the situation previously, where the A12 ended on the A11 due north of Stratford at Leytonstone.

A final section linking Romford with Gallows Corner is known as Main Road.