The Metropolitan Borough of Westminster was a metropolitan borough in the County of London from 1900 to 1965.
By royal charter dated 29 October 1900 the borough was granted the title City of Westminster. Westminster had originally been created a city and seat of the short-lived Diocese of Westminster in 1541. The diocese was suppressed in 1550, but the area was still known as a "city", although without official sanction.
Previous to the borough’s formation it had been administered by five separate local bodies: the Vestry of St George Hanover Square, the Vestry of St Martin in the Fields, Strand District Board of Works, Westminster District Board of Works and the Vestry of Westminster St James. The Close of the Collegiate Church of St Peter had not been under the control of any local authority prior to 1900.
The borough was formed from eleven civil parishes and extra-parochial places: Close of the Collegiate Church of St Peter, Liberty of the Rolls, Precinct of the Savoy, St Anne Soho, St Clement Danes, St George Hanover Square, St James Piccadilly, St Martin in the Fields, St Mary-le-Strand, St Paul Covent Garden and Westminster St Margaret and St John. In 1922 these eleven were combined into a single civil parish called City of Westminster, which was conterminous with the metropolitan borough.
