Westminster and the City of London was an electoral division for the purposes of elections to the Greater London Council. The constituency elected four councillors for a three-year term in 1964, 1967 and 1970. Desmond Plummer, the leader of the Greater London Council from 1967 to 1973, was elected from the division.

It was planned to use the same boundaries as the Westminster Parliament constituencies for election of councillors to the Greater London Council (GLC), as had been the practice for elections to the predecessor London County Council, but those that existed in 1965 crossed the Greater London boundary. Until new constituencies could be settled, the 32 London boroughs were used as electoral areas. The City of Westminster was joined with the City of London for this purpose, creating a constituency called Westminster and the City of London. It replaced the London County Council constituencies of Cities of London and Westminster, Paddington North, Paddington South and St Marylebone.

Covering much of the innermost part of London, including large parts of Central London and the West End of London, the area was in a long-term period of population decline that was yet to reverse. The electorate reduced from 192,744 in 1964 to 174,838 in 1970. The population in 1969 was estimated to be 244,710. Covering an area of 6,010.2 acres (24.322 km²), the population density was 40.7 inhabitants per acre (10,100/km²).

The electoral division was replaced from 1973 by the single-member electoral divisions of City of London and Westminster South, St Marylebone and Paddington.^[1]

The Westminster and the City of London constituency was used for the Greater London Council elections in 1964,^[2] 1967^[3] and 1970.^[4] Four councillors were elected at each election using first-past-the-post voting.^[5] Desmond Plummer, who was successful at all three elections, was Leader of the Greater London Council from 1967 to 1973.