The 2012 Cardiff Council election took place on Thursday 3 May 2012 to elect members of Cardiff Council in Wales. This was the same day as other United Kingdom local elections. It was preceded by the 2008 election and followed by the 2017 election
Labour gained control of the council from the Liberal Democrats and Plaid Cymru, after gaining 32 seats. The Liberal Democrat leader of the council, Rodney Berman, lost his seat by 51 votes after two recounts, bringing Labour's gains to 33. Sixty-one-year-old Labour councillor Heather Joyce, nicknamed 'Supernan' by the local newspaper, became the new council leader.
Fenella Bowden, elected as a Liberal Democrat in 2012, stood as an Independent.
Duncan Macdonald had been elected as a Conservative in 2008.