The councillors were elected for electoral divisions corresponding to the new parliamentary constituencies that had been created by the Representation of the People Act 1918.

The council was elected by First Past the Post, with each elector having two votes in the dual-member seats.

Among the defeated candidates were future Labour Leader Clement Attlee and future Conservative Chief Whip David Margesson The Municipal Reform Party won an overall majority of seats, electing 68 councillors.

(The defeated candidate was made an Alderman after the election) As before they decided to operate a form of Coalition with the Progressives.

There were six casual vacancies among the aldermen in the term of the tenth London County Council, which were filled as follows:[3]