An election to the County Council of London took place on 5 March 1913. It was the ninth triennial election of the whole Council.
The size of the council was 118 councillors and 19 aldermen. The councillors were elected for electoral divisions corresponding to the parliamentary constituencies that had been created by the Representation of the People Act 1884. There were 57 dual member constituencies and one four member constituency. The council was elected by First Past the Post with each elector having two votes in the dual member seats. Unlike for parliamentary elections, women qualified as electors for these elections on exactly the same basis as men. Women were also permitted to stand as candidates for election.
The election was to be the last held before the outbreak of the First World War: in 1915 legislation was enacted to postpone all local elections until the end of the conflict (see below). The term of office of the councillors was extended to 1919 when triennial elections r