The Metropolitan Borough of Lewisham was a metropolitan borough in the County of London between 1899 and 1965, when it became part of the London Borough of Lewisham along with the Metropolitan Borough of Deptford.

It bordered Deptford, Greenwich, Camberwell, and had a portion of the southern boundary of the county.

Places in it included Lewisham, Blackheath, Lee, Hither Green, Catford, Brockley, Forest Hill and part of Sydenham.