It took place on the same day as other district council elections in the United Kingdom.
The 1973 election saw the Labour Party win a significant majority on the Council.
The 1973 election was the first to the new local authority, with councillors acting in a shadow capacity until April 1974.
The wards to the new council remained the same in 1973 as the previous Cardiff City Council, but with the addition of two new wards: Lisvane, Llanedeyrn and St Mellons (1 seat); and Radyr, St Fagans, Tongwynlais (2 seats).
The position of alderman was to be abolished, with all members of the new council being elected ward councillors.