| St Margaret and St John St Margaret (until 1727) Westminster District (1855–1887) | |
|---|---|
| Civil parish | |
 | |
| Area | |
| • 1881 | 815 acres (3.30 km2) |
| • 1901 | 766 acres (3.10 km2) |
| • 1921 | 767 acres (3.10 km2) |
| • Coordinates | 51°29′58″N 0°08′00″W / 51.4995°N 0.1333°W |
| Population | |
| • 1881 | 59,926 |
| • 1901 | 51,068 |
| • 1921 | 39,916 |
| Density | |
| • 1881 | 73.53/acre |
| • 1901 | 66.67/acre |
| • 1921 | 52.04/acre |
| History | |
| • Origin | Ancient parish |
| • Created | 10th century |
| • Abolished | 1922 |
| • Succeeded by | City of Westminster (parish) |
| Status | District (1855–1887) |
| Government | St Margaret Vestry (16th century–1727) St Margaret and St John Vestry (1727–1855) Westminster District Board of Works (1855–1887) St Margaret and St John Combined Vestry (1887–1900) |
| • Type | Vestry |
| • HQ | Town Hall, Caxton Street |
 Seal of the united vestry in 1888 | |
| Contained within | |
| • City and liberty | Westminster (until 1900) |
| • Metropolitan borough | Westminster (1900–1922) |
| • Poor Law Union | St George's (1870–1913) City of Westminster (1913–1922) |
| Subdivisions | |
| • Type | Parishes (after 1727) |
| • Units | St John St Margaret |
St Margaret was an ancient parish in the City and Liberty of Westminster and the county of Middlesex. It included the core of modern Westminster, including the Palace of Westminster and the area around, but not including Westminster Abbey. It was divided into St Margaret's and St John's in 1727, to coincide with the building of the Church of St John the Evangelist, constructed by the Commission for Building Fifty New Churches in Smith Square to meet the demands of the growing population, but there continued to be a single vestry for the parishes of St Margaret and St John. This was reformed in 1855 by the Metropolis Management Act, and the two parishes formed the Westminster District until 1887. St Margaret and St John became part of the County of London in 1889. The vestry was abolished in 1900, to be replaced by Westminster City Council, but St Margaret and St John continued to have a nominal existence until 1922.