Sedgefield Borough Council elections were generally held every four years between the council's creation in 1974 and its abolition in 2009. Sedgefield was a non-metropolitan district in County Durham, England. On 1 April 2009 the council's functions passed to Durham County Council, which became a unitary authority.
The first election to the council was held in 1973, initially operating as a shadow authority before coming into its powers on 1 April 1974. Throughout the council's existence from 1974 to 2009, Labour held a majority of the seats on the council.
The leaders of the council were:
The following is an incomplete list of by-elections to Sedgefield Borough Council.