Hammersmith was a civil parish and metropolitan borough in London, England. It was formed as a civil parish in 1834 from the chapelry of Hammersmith that had existed in the ancient parish of Fulham, Middlesex since 1631. The parish was grouped with Fulham as the Fulham District from 1855 until 1886, when separate parish administration was restored. In 1889 it became part of the County of London and in 1900 it became a metropolitan borough. It included Hammersmith, Wormwood Scrubs, Old Oak Common and Shepherd's Bush. In 1965 it was abolished and became the northern part of the London Borough of Hammersmith, since 1979 renamed the London Borough of Hammersmith and Fulham.

The Metropolitan Borough of Fulham was a metropolitan borough in the County of London between 1900 and 1965, when it was merged with the Metropolitan Borough of Hammersmith to form the London Borough of Hammersmith and Fulham. It was a riverside borough, and comprised the many centuries-long definition of Fulham so included parts often considered of independent character today Walham Green, Parsons Green, Hurlingham, Sands End and that part of Chelsea Harbour west of Counter's Creek. The SW6 postal district approximately follows this as does the direct, though less empowered, predecessor Fulham civil parish.