Durham County Council elections are held every four years. Durham County Council is the local authority for the unitary authority of County Durham. 98 councillors are elected from 51 wards.

Prior to the formation of the unitary authority in 2009, the county was divided into a number of second tier districts. The following articles detail the local elections to those district councils. The Borough of Darlington has formed a unitary authority outside the area covered by the County Council since 1997.

The following is an incomplete list of by-elections to Durham County Council.

Andrew Kilburn, who won a seat in the 2025 election, did not take up his seat due to being disqualified as a local government employee.