Poplar was a local government district in the metropolitan area of London, England. It was formed as a district of the Metropolis in 1855 and became a metropolitan borough in the County of London in 1900. It comprised Poplar, Millwall, Bromley-by-Bow and Bow as well as Old Ford, Fish Island and Cubitt Town.

Poplar is a district in East London, England, now part of the London Borough of Tower Hamlets and is five miles (8 km) east of Charing Cross.